Merge tag 'sound-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound updates from Takashi Iwai:
 "As the diffstat shows we've had again a lot of works done for this
  cycle: the majority of changes are the continued componentization and
  code refactoring in ASoC, the tree-wide PCM API updates and cleanups
  and SOF updates while a few ASoC driver updates are seen, too.

  Here we go, some highlights:

  Core:
   - Finally y2038 support landed to ALSA ABI; some ioctls have been
     extended and lots of tricks were applied
   - Applying the new managed PCM buffer API to all drivers; the API
     itself was already merged in 5.5
   - The already deprecated dimension support in ALSA control API is
     dropped completely now
   - Verification of ALSA control elements to catch API misuses

  ASoC:
   - Further code refactorings and moving things to the component level
   - Lots of updates and improvements on SOF / Intel drivers; now
     including common HDMI driver and SoundWire support
   - New driver support for Ingenic JZ4770, Mediatek MT6660, Qualcomm
     WCD934x and WSA881x, and Realtek RT700, RT711, RT715, RT1011,
     RT1015 and RT1308

  HD-audio:
   - Improved ring-buffer communications using waitqueue
   - Drop the superfluous buffer preallocation on x86

  Others:
   - Many code cleanups, mostly constifications over the whole tree
   - USB-audio: quirks for MOTU, Corsair Virtuoso, Line6 Helix
   - FireWire: code refactoring for oxfw and dice drivers"

* tag 'sound-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (638 commits)
  ALSA: usb-audio: add quirks for Line6 Helix devices fw>=2.82
  ALSA: hda: Add Clevo W65_67SB the power_save blacklist
  ASoC: soc-core: remove null_snd_soc_ops
  ASoC: soc-pcm: add soc_rtd_trigger()
  ASoC: soc-pcm: add soc_rtd_hw_free()
  ASoC: soc-pcm: add soc_rtd_hw_params()
  ASoC: soc-pcm: add soc_rtd_prepare()
  ASoC: soc-pcm: add soc_rtd_shutdown()
  ASoC: soc-pcm: add soc_rtd_startup()
  ASoC: rt1015: add rt1015 amplifier driver
  ASoC: madera: Correct some kernel doc
  ASoC: topology: fix soc_tplg_fe_link_create() - link->dobj initialization order
  ASoC: Intel: skl_hda_dsp_common: Fix global-out-of-bounds bug
  ASoC: madera: Correct DMIC only input hook ups
  ALSA: cs46xx: fix spelling mistake "to" -> "too"
  ALSA: hda - Add docking station support for Lenovo Thinkpad T420s
  ASoC: Add MediaTek MT6660 Speaker Amp Driver
  ASoC: dt-bindings: rt5645: add suppliers
  ASoC: max98090: fix deadlock in max98090_dapm_put_enum_double()
  ASoC: dapm: add snd_soc_dapm_put_enum_double_locked
  ...

34 files changed, 298 insertions, 293 deletions

diff --git a/sound/usb/6fire/control.c b/sound/usb/6fire/control.c
index de1f030eaf72..20f34d2ace5f 100644
--- a/sound/usb/6fire/control.c
+++ b/sound/usb/6fire/control.c
@@ -397,7 +397,7 @@ static int usb6fire_control_digital_thru_get(struct snd_kcontrol *kcontrol,
 	return 0;
 }
 
-static struct snd_kcontrol_new vol_elements[] = {
+static const struct snd_kcontrol_new vol_elements[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = "Analog Playback Volume",
@@ -437,7 +437,7 @@ static struct snd_kcontrol_new vol_elements[] = {
 	{}
 };
 
-static struct snd_kcontrol_new mute_elements[] = {
+static const struct snd_kcontrol_new mute_elements[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = "Analog Playback Switch",
@@ -471,7 +471,7 @@ static struct snd_kcontrol_new mute_elements[] = {
 	{}
 };
 
-static struct snd_kcontrol_new elements[] = {
+static const struct snd_kcontrol_new elements[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = "Line/Phono Capture Route",
@@ -517,7 +517,7 @@ static int usb6fire_control_add_virtual(
 	struct control_runtime *rt,
 	struct snd_card *card,
 	char *name,
-	struct snd_kcontrol_new *elems)
+	const struct snd_kcontrol_new *elems)
 {
 	int ret;
 	int i;
diff --git a/sound/usb/6fire/pcm.c b/sound/usb/6fire/pcm.c
index cdc5dd7fbe16..7168f1c6a37a 100644
--- a/sound/usb/6fire/pcm.c
+++ b/sound/usb/6fire/pcm.c
@@ -446,18 +446,6 @@ static int usb6fire_pcm_close(struct snd_pcm_substream *alsa_sub)
 	return 0;
 }
 
-static int usb6fire_pcm_hw_params(struct snd_pcm_substream *alsa_sub,
-		struct snd_pcm_hw_params *hw_params)
-{
-	return snd_pcm_lib_malloc_pages(alsa_sub,
-					params_buffer_bytes(hw_params));
-}
-
-static int usb6fire_pcm_hw_free(struct snd_pcm_substream *alsa_sub)
-{
-	return snd_pcm_lib_free_pages(alsa_sub);
-}
-
 static int usb6fire_pcm_prepare(struct snd_pcm_substream *alsa_sub)
 {
 	struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
@@ -554,9 +542,6 @@ static snd_pcm_uframes_t usb6fire_pcm_pointer(
 static const struct snd_pcm_ops pcm_ops = {
 	.open = usb6fire_pcm_open,
 	.close = usb6fire_pcm_close,
-	.ioctl = snd_pcm_lib_ioctl,
-	.hw_params = usb6fire_pcm_hw_params,
-	.hw_free = usb6fire_pcm_hw_free,
 	.prepare = usb6fire_pcm_prepare,
 	.trigger = usb6fire_pcm_trigger,
 	.pointer = usb6fire_pcm_pointer,
@@ -658,8 +643,7 @@ int usb6fire_pcm_init(struct sfire_chip *chip)
 	strcpy(pcm->name, "DMX 6Fire USB");
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_ops);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_ops);
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
-					      NULL, 0, 0);
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
 
 	rt->instance = pcm;
 
diff --git a/sound/usb/bcd2000/bcd2000.c b/sound/usb/bcd2000/bcd2000.c
index 6e3175826faf..010976d9ceb2 100644
--- a/sound/usb/bcd2000/bcd2000.c
+++ b/sound/usb/bcd2000/bcd2000.c
@@ -25,9 +25,9 @@ static const struct usb_device_id id_table[] = {
 	{ },
 };
 
-static unsigned char device_cmd_prefix[] = {0x03, 0x00};
+static const unsigned char device_cmd_prefix[] = {0x03, 0x00};
 
-static unsigned char bcd2000_init_sequence[] = {
+static const unsigned char bcd2000_init_sequence[] = {
 	0x07, 0x00, 0x00, 0x00, 0x78, 0x48, 0x1c, 0x81,
 	0xc4, 0x00, 0x00, 0x00, 0x5e, 0x53, 0x4a, 0xf7,
 	0x18, 0xfa, 0x11, 0xff, 0x6c, 0xf3, 0x90, 0xff,
diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c
index 970eb0865ba3..e9243d53a107 100644
--- a/sound/usb/caiaq/audio.c
+++ b/sound/usb/caiaq/audio.c
@@ -30,7 +30,7 @@
 #define MAKE_CHECKBYTE(cdev,stream,i) \
 	(stream << 1) | (~(i / (cdev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
 
-static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
+static const struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
 	.info 		= (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 			   SNDRV_PCM_INFO_BLOCK_TRANSFER),
 	.formats 	= SNDRV_PCM_FMTBIT_S24_3BE,
@@ -167,17 +167,11 @@ static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
 	return 0;
 }
 
-static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
-				       struct snd_pcm_hw_params *hw_params)
-{
-	return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params));
-}
-
 static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
 {
 	struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
 	deactivate_substream(cdev, sub);
-	return snd_pcm_lib_free_pages(sub);
+	return 0;
 }
 
 /* this should probably go upstream */
@@ -185,7 +179,7 @@ static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
 #error "Change this table"
 #endif
 
-static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
+static const unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
 				48000, 64000, 88200, 96000, 176400, 192000 };
 
 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
@@ -327,8 +321,6 @@ unlock:
 static const struct snd_pcm_ops snd_usb_caiaq_ops = {
 	.open =		snd_usb_caiaq_substream_open,
 	.close =	snd_usb_caiaq_substream_close,
-	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	snd_usb_caiaq_pcm_hw_params,
 	.hw_free =	snd_usb_caiaq_pcm_hw_free,
 	.prepare =	snd_usb_caiaq_pcm_prepare,
 	.trigger =	snd_usb_caiaq_pcm_trigger,
@@ -841,8 +833,8 @@ int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev)
 				&snd_usb_caiaq_ops);
 	snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE,
 				&snd_usb_caiaq_ops);
-	snd_pcm_lib_preallocate_pages_for_all(cdev->pcm, SNDRV_DMA_TYPE_VMALLOC,
-					      NULL, 0, 0);
+	snd_pcm_set_managed_buffer_all(cdev->pcm, SNDRV_DMA_TYPE_VMALLOC,
+				       NULL, 0, 0);
 
 	cdev->data_cb_info =
 		kmalloc_array(N_URBS, sizeof(struct snd_usb_caiaq_cb_info),
diff --git a/sound/usb/caiaq/control.c b/sound/usb/caiaq/control.c
index 532e354f6124..af459c49baf4 100644
--- a/sound/usb/caiaq/control.c
+++ b/sound/usb/caiaq/control.c
@@ -163,14 +163,14 @@ struct caiaq_controller {
 	int index;
 };
 
-static struct caiaq_controller ak1_controller[] = {
+static const struct caiaq_controller ak1_controller[] = {
 	{ "LED left", 	2 },
 	{ "LED middle", 1 },
 	{ "LED right", 	0 },
 	{ "LED ring", 	3 }
 };
 
-static struct caiaq_controller rk2_controller[] = {
+static const struct caiaq_controller rk2_controller[] = {
 	{ "LED 1",		5  },
 	{ "LED 2",		4  },
 	{ "LED 3",		3  },
@@ -196,7 +196,7 @@ static struct caiaq_controller rk2_controller[] = {
 	{ "LED 7seg_3g",	23 }
 };
 
-static struct caiaq_controller rk3_controller[] = {
+static const struct caiaq_controller rk3_controller[] = {
 	{ "LED 7seg_1a",        0 + 0 },
 	{ "LED 7seg_1b",        0 + 1 },
 	{ "LED 7seg_1c",        0 + 2 },
@@ -244,7 +244,7 @@ static struct caiaq_controller rk3_controller[] = {
 	{ "LED pedal",		32 + 8 }
 };
 
-static struct caiaq_controller kore_controller[] = {
+static const struct caiaq_controller kore_controller[] = {
 	{ "LED F1",		8   | CNT_INTVAL },
 	{ "LED F2",		12  | CNT_INTVAL },
 	{ "LED F3",		0   | CNT_INTVAL },
@@ -278,7 +278,7 @@ static struct caiaq_controller kore_controller[] = {
 	{ "LED control",	26  | CNT_INTVAL }
 };
 
-static struct caiaq_controller a8dj_controller[] = {
+static const struct caiaq_controller a8dj_controller[] = {
 	{ "Current input mode",			0 | CNT_INTVAL 	},
 	{ "GND lift for TC Vinyl mode", 	24 + 0 		},
 	{ "GND lift for TC CD/Line mode", 	24 + 1 		},
@@ -286,11 +286,11 @@ static struct caiaq_controller a8dj_controller[] = {
 	{ "Software lock", 			40 		}
 };
 
-static struct caiaq_controller a4dj_controller[] = {
+static const struct caiaq_controller a4dj_controller[] = {
 	{ "Current input mode",	0 | CNT_INTVAL 	}
 };
 
-static struct caiaq_controller kontrolx1_controller[] = {
+static const struct caiaq_controller kontrolx1_controller[] = {
 	{ "LED FX A: ON",		7 | CNT_INTVAL	},
 	{ "LED FX A: 1",		6 | CNT_INTVAL	},
 	{ "LED FX A: 2",		5 | CNT_INTVAL	},
@@ -327,7 +327,7 @@ static struct caiaq_controller kontrolx1_controller[] = {
 	{ "LED Deck B: SYNC",		8  | CNT_INTVAL	},
 };
 
-static struct caiaq_controller kontrols4_controller[] = {
+static const struct caiaq_controller kontrols4_controller[] = {
 	{ "LED: Master: Quant",			10  | CNT_INTVAL },
 	{ "LED: Master: Headphone",		11  | CNT_INTVAL },
 	{ "LED: Master: Master",		12  | CNT_INTVAL },
@@ -500,7 +500,7 @@ static struct caiaq_controller kontrols4_controller[] = {
 	{ "LED: FX2: Mode",			133 | CNT_INTVAL },
 };
 
-static struct caiaq_controller maschine_controller[] = {
+static const struct caiaq_controller maschine_controller[] = {
 	{ "LED: Pad 1",				3  | CNT_INTVAL },
 	{ "LED: Pad 2",				2  | CNT_INTVAL },
 	{ "LED: Pad 3",				1  | CNT_INTVAL },
@@ -568,7 +568,7 @@ static struct caiaq_controller maschine_controller[] = {
 	{ "Backlight Display",			59 | CNT_INTVAL }
 };
 
-static int add_controls(struct caiaq_controller *c, int num,
+static int add_controls(const struct caiaq_controller *c, int num,
 			struct snd_usb_caiaqdev *cdev)
 {
 	int i, ret;
diff --git a/sound/usb/caiaq/input.c b/sound/usb/caiaq/input.c
index 533eb69fe4e6..1e2cf2f08eec 100644
--- a/sound/usb/caiaq/input.c
+++ b/sound/usb/caiaq/input.c
@@ -14,13 +14,13 @@
 #include "device.h"
 #include "input.h"
 
-static unsigned short keycode_ak1[] =  { KEY_C, KEY_B, KEY_A };
-static unsigned short keycode_rk2[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
+static const unsigned short keycode_ak1[] =  { KEY_C, KEY_B, KEY_A };
+static const unsigned short keycode_rk2[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
 					 KEY_5, KEY_6, KEY_7 };
-static unsigned short keycode_rk3[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
+static const unsigned short keycode_rk3[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
 					 KEY_5, KEY_6, KEY_7, KEY_8, KEY_9 };
 
-static unsigned short keycode_kore[] = {
+static const unsigned short keycode_kore[] = {
 	KEY_FN_F1,      /* "menu"               */
 	KEY_FN_F7,      /* "lcd backlight       */
 	KEY_FN_F2,      /* "control"            */
@@ -60,7 +60,7 @@ static unsigned short keycode_kore[] = {
 #define MASCHINE_PADS      (16)
 #define MASCHINE_PAD(X)    ((X) + ABS_PRESSURE)
 
-static unsigned short keycode_maschine[] = {
+static const unsigned short keycode_maschine[] = {
 	MASCHINE_BUTTON(40), /* mute       */
 	MASCHINE_BUTTON(39), /* solo       */
 	MASCHINE_BUTTON(38), /* select     */
diff --git a/sound/usb/card.c b/sound/usb/card.c
index 9f743ebae615..827fb0bc8b56 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -600,6 +600,10 @@ static int usb_audio_probe(struct usb_interface *intf,
 		}
 	}
 	if (! chip) {
+		err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
+		if (err < 0)
+			goto __error;
+
 		/* it's a fresh one.
 		 * now look for an empty slot and create a new card instance
 		 */
diff --git a/sound/usb/format.c b/sound/usb/format.c
index d79db71305f6..9260136e4c9b 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -292,10 +292,13 @@ static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
 						struct audioformat *fp)
 {
 	switch (chip->usb_id) {
-	case USB_ID(0x0E41, 0x4241): /* Line6 Helix */
-	case USB_ID(0x0E41, 0x4242): /* Line6 Helix Rack */
-	case USB_ID(0x0E41, 0x4244): /* Line6 Helix LT */
-	case USB_ID(0x0E41, 0x4246): /* Line6 HX-Stomp */
+	case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
+	case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
+	case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
+	case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
+	case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
+	case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
+	case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
 		/* supported rates: 48Khz */
 		kfree(fp->rate_table);
 		fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
diff --git a/sound/usb/hiface/pcm.c b/sound/usb/hiface/pcm.c
index e0de71917274..a148caa5f48e 100644
--- a/sound/usb/hiface/pcm.c
+++ b/sound/usb/hiface/pcm.c
@@ -415,18 +415,6 @@ static int hiface_pcm_close(struct snd_pcm_substream *alsa_sub)
 	return 0;
 }
 
-static int hiface_pcm_hw_params(struct snd_pcm_substream *alsa_sub,
-				struct snd_pcm_hw_params *hw_params)
-{
-	return snd_pcm_lib_malloc_pages(alsa_sub,
-					params_buffer_bytes(hw_params));
-}
-
-static int hiface_pcm_hw_free(struct snd_pcm_substream *alsa_sub)
-{
-	return snd_pcm_lib_free_pages(alsa_sub);
-}
-
 static int hiface_pcm_prepare(struct snd_pcm_substream *alsa_sub)
 {
 	struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
@@ -512,9 +500,6 @@ static snd_pcm_uframes_t hiface_pcm_pointer(struct snd_pcm_substream *alsa_sub)
 static const struct snd_pcm_ops pcm_ops = {
 	.open = hiface_pcm_open,
 	.close = hiface_pcm_close,
-	.ioctl = snd_pcm_lib_ioctl,
-	.hw_params = hiface_pcm_hw_params,
-	.hw_free = hiface_pcm_hw_free,
 	.prepare = hiface_pcm_prepare,
 	.trigger = hiface_pcm_trigger,
 	.pointer = hiface_pcm_pointer,
@@ -613,8 +598,8 @@ int hiface_pcm_init(struct hiface_chip *chip, u8 extra_freq)
 
 	strlcpy(pcm->name, "USB-SPDIF Audio", sizeof(pcm->name));
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_ops);
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
-					      NULL, 0, 0);
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
+				       NULL, 0, 0);
 
 	rt->instance = pcm;
 
diff --git a/sound/usb/line6/capture.c b/sound/usb/line6/capture.c
index 82abef3fe90d..663d608c4287 100644
--- a/sound/usb/line6/capture.c
+++ b/sound/usb/line6/capture.c
@@ -247,7 +247,6 @@ static int snd_line6_capture_close(struct snd_pcm_substream *substream)
 const struct snd_pcm_ops snd_line6_capture_ops = {
 	.open = snd_line6_capture_open,
 	.close = snd_line6_capture_close,
-	.ioctl = snd_pcm_lib_ioctl,
 	.hw_params = snd_line6_hw_params,
 	.hw_free = snd_line6_hw_free,
 	.prepare = snd_line6_prepare,
diff --git a/sound/usb/line6/pcm.c b/sound/usb/line6/pcm.c
index 9c437c716cfd..fdbdfb7bce92 100644
--- a/sound/usb/line6/pcm.c
+++ b/sound/usb/line6/pcm.c
@@ -359,13 +359,6 @@ int snd_line6_hw_params(struct snd_pcm_substream *substream,
 	if (ret < 0)
 		goto error;
 
-	ret = snd_pcm_lib_malloc_pages(substream,
-				       params_buffer_bytes(hw_params));
-	if (ret < 0) {
-		line6_buffer_release(line6pcm, pstr, LINE6_STREAM_PCM);
-		goto error;
-	}
-
 	pstr->period = params_period_bytes(hw_params);
  error:
 	mutex_unlock(&line6pcm->state_mutex);
@@ -381,7 +374,7 @@ int snd_line6_hw_free(struct snd_pcm_substream *substream)
 	mutex_lock(&line6pcm->state_mutex);
 	line6_buffer_release(line6pcm, pstr, LINE6_STREAM_PCM);
 	mutex_unlock(&line6pcm->state_mutex);
-	return snd_pcm_lib_free_pages(substream);
+	return 0;
 }
 
 
@@ -501,8 +494,8 @@ static int snd_line6_new_pcm(struct usb_line6 *line6, struct snd_pcm **pcm_ret)
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);
 
 	/* pre-allocation of buffers */
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
-					      NULL, 64 * 1024, 128 * 1024);
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+				       NULL, 64 * 1024, 128 * 1024);
 	return 0;
 }
 
diff --git a/sound/usb/line6/playback.c b/sound/usb/line6/playback.c
index 2e8ead3f9bc2..01930ce7bd75 100644
--- a/sound/usb/line6/playback.c
+++ b/sound/usb/line6/playback.c
@@ -392,7 +392,6 @@ static int snd_line6_playback_close(struct snd_pcm_substream *substream)
 const struct snd_pcm_ops snd_line6_playback_ops = {
 	.open = snd_line6_playback_open,
 	.close = snd_line6_playback_close,
-	.ioctl = snd_pcm_lib_ioctl,
 	.hw_params = snd_line6_hw_params,
 	.hw_free = snd_line6_hw_free,
 	.prepare = snd_line6_prepare,
diff --git a/sound/usb/line6/pod.c b/sound/usb/line6/pod.c
index ee4c9d220fdf..cd44cb5f1310 100644
--- a/sound/usb/line6/pod.c
+++ b/sound/usb/line6/pod.c
@@ -110,7 +110,7 @@ enum {
 	POD_BUSY_MIDISEND
 };
 
-static struct snd_ratden pod_ratden = {
+static const struct snd_ratden pod_ratden = {
 	.num_min = 78125,
 	.num_max = 78125,
 	.num_step = 1,
diff --git a/sound/usb/line6/podhd.c b/sound/usb/line6/podhd.c
index 27bf61c177c0..d37db32ecd3b 100644
--- a/sound/usb/line6/podhd.c
+++ b/sound/usb/line6/podhd.c
@@ -42,7 +42,7 @@ struct usb_line6_podhd {
 
 #define line6_to_podhd(x)	container_of(x, struct usb_line6_podhd, line6)
 
-static struct snd_ratden podhd_ratden = {
+static const struct snd_ratden podhd_ratden = {
 	.num_min = 48000,
 	.num_max = 48000,
 	.num_step = 1,
diff --git a/sound/usb/line6/toneport.c b/sound/usb/line6/toneport.c
index d0a555dbe324..94dd5e7ab2e6 100644
--- a/sound/usb/line6/toneport.c
+++ b/sound/usb/line6/toneport.c
@@ -63,7 +63,7 @@ static int toneport_send_cmd(struct usb_device *usbdev, int cmd1, int cmd2);
 
 #define TONEPORT_PCM_DELAY 1
 
-static struct snd_ratden toneport_ratden = {
+static const struct snd_ratden toneport_ratden = {
 	.num_min = 44100,
 	.num_max = 44100,
 	.num_step = 1,
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index b737f0ec77d0..392e5fda680c 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -1408,8 +1408,8 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi,
 		/*
 		 * Some devices only work with 9 bytes packet size:
 		 */
-	case USB_ID(0x0644, 0x800E): /* Tascam US-122L */
-	case USB_ID(0x0644, 0x800F): /* Tascam US-144 */
+	case USB_ID(0x0644, 0x800e): /* Tascam US-122L */
+	case USB_ID(0x0644, 0x800f): /* Tascam US-144 */
 		ep->max_transfer = 9;
 		break;
 	}
diff --git a/sound/usb/misc/ua101.c b/sound/usb/misc/ua101.c
index 566a4a31528a..884e740a785c 100644
--- a/sound/usb/misc/ua101.c
+++ b/sound/usb/misc/ua101.c
@@ -730,11 +730,7 @@ static int capture_pcm_hw_params(struct snd_pcm_substream *substream,
 	mutex_lock(&ua->mutex);
 	err = start_usb_capture(ua);
 	mutex_unlock(&ua->mutex);
-	if (err < 0)
-		return err;
-
-	return snd_pcm_lib_malloc_pages(substream,
-					params_buffer_bytes(hw_params));
+	return err;
 }
 
 static int playback_pcm_hw_params(struct snd_pcm_substream *substream,
@@ -748,16 +744,7 @@ static int playback_pcm_hw_params(struct snd_pcm_substream *substream,
 	if (err >= 0)
 		err = start_usb_playback(ua);
 	mutex_unlock(&ua->mutex);
-	if (err < 0)
-		return err;
-
-	return snd_pcm_lib_malloc_pages(substream,
-					params_buffer_bytes(hw_params));
-}
-
-static int ua101_pcm_hw_free(struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
+	return err;
 }
 
 static int capture_pcm_prepare(struct snd_pcm_substream *substream)
@@ -883,9 +870,7 @@ static snd_pcm_uframes_t playback_pcm_pointer(struct snd_pcm_substream *subs)
 static const struct snd_pcm_ops capture_pcm_ops = {
 	.open = capture_pcm_open,
 	.close = capture_pcm_close,
-	.ioctl = snd_pcm_lib_ioctl,
 	.hw_params = capture_pcm_hw_params,
-	.hw_free = ua101_pcm_hw_free,
 	.prepare = capture_pcm_prepare,
 	.trigger = capture_pcm_trigger,
 	.pointer = capture_pcm_pointer,
@@ -894,9 +879,7 @@ static const struct snd_pcm_ops capture_pcm_ops = {
 static const struct snd_pcm_ops playback_pcm_ops = {
 	.open = playback_pcm_open,
 	.close = playback_pcm_close,
-	.ioctl = snd_pcm_lib_ioctl,
 	.hw_params = playback_pcm_hw_params,
-	.hw_free = ua101_pcm_hw_free,
 	.prepare = playback_pcm_prepare,
 	.trigger = playback_pcm_trigger,
 	.pointer = playback_pcm_pointer,
@@ -1294,8 +1277,8 @@ static int ua101_probe(struct usb_interface *interface,
 	strcpy(ua->pcm->name, name);
 	snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_pcm_ops);
 	snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_pcm_ops);
-	snd_pcm_lib_preallocate_pages_for_all(ua->pcm, SNDRV_DMA_TYPE_VMALLOC,
-					      NULL, 0, 0);
+	snd_pcm_set_managed_buffer_all(ua->pcm, SNDRV_DMA_TYPE_VMALLOC,
+				       NULL, 0, 0);
 
 	err = snd_usbmidi_create(card, ua->intf[INTF_MIDI],
 				 &ua->midi_list, &midi_quirk);
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 6cd4ff09c5ee..d659fdb475e2 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1020,7 +1020,7 @@ struct usb_feature_control_info {
 	int type_uac2;	/* data type for uac2 if different from uac1, else -1 */
 };
 
-static struct usb_feature_control_info audio_feature_info[] = {
+static const struct usb_feature_control_info audio_feature_info[] = {
 	{ UAC_FU_MUTE,			"Mute",			USB_MIXER_INV_BOOLEAN, -1 },
 	{ UAC_FU_VOLUME,		"Volume",		USB_MIXER_S16, -1 },
 	{ UAC_FU_BASS,			"Tone Control - Bass",	USB_MIXER_S8, -1 },
@@ -1445,7 +1445,7 @@ error:
 	return 0;
 }
 
-static struct snd_kcontrol_new usb_feature_unit_ctl = {
+static const struct snd_kcontrol_new usb_feature_unit_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "", /* will be filled later manually */
 	.info = mixer_ctl_feature_info,
@@ -1466,7 +1466,7 @@ static const struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
  * A control which shows the boolean value from reading a UAC control on
  * the master channel.
  */
-static struct snd_kcontrol_new usb_bool_master_control_ctl_ro = {
+static const struct snd_kcontrol_new usb_bool_master_control_ctl_ro = {
 	.iface = SNDRV_CTL_ELEM_IFACE_CARD,
 	.name = "", /* will be filled later manually */
 	.access = SNDRV_CTL_ELEM_ACCESS_READ,
@@ -1488,7 +1488,7 @@ static const struct snd_kcontrol_new usb_connector_ctl_ro = {
  * This symbol is exported in order to allow the mixer quirks to
  * hook up to the standard feature unit control mechanism
  */
-struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
+const struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
 
 /*
  * build a feature control
@@ -1526,7 +1526,7 @@ static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,
 	strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));
 }
 
-static struct usb_feature_control_info *get_feature_control_info(int control)
+static const struct usb_feature_control_info *get_feature_control_info(int control)
 {
 	int i;
 
@@ -1544,7 +1544,7 @@ static void __build_feature_ctl(struct usb_mixer_interface *mixer,
 				struct usb_audio_term *oterm,
 				int unitid, int nameid, int readonly_mask)
 {
-	struct usb_feature_control_info *ctl_info;
+	const struct usb_feature_control_info *ctl_info;
 	unsigned int len = 0;
 	int mapped_name = 0;
 	struct snd_kcontrol *kctl;
@@ -2198,7 +2198,7 @@ static const struct snd_kcontrol_new mixer_procunit_ctl = {
  */
 struct procunit_value_info {
 	int control;
-	char *suffix;
+	const char *suffix;
 	int val_type;
 	int min_value;
 };
@@ -2206,44 +2206,44 @@ struct procunit_value_info {
 struct procunit_info {
 	int type;
 	char *name;
-	struct procunit_value_info *values;
+	const struct procunit_value_info *values;
 };
 
-static struct procunit_value_info undefined_proc_info[] = {
+static const struct procunit_value_info undefined_proc_info[] = {
 	{ 0x00, "Control Undefined", 0 },
 	{ 0 }
 };
 
-static struct procunit_value_info updown_proc_info[] = {
+static const struct procunit_value_info updown_proc_info[] = {
 	{ UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
 	{ UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
 	{ 0 }
 };
-static struct procunit_value_info prologic_proc_info[] = {
+static const struct procunit_value_info prologic_proc_info[] = {
 	{ UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
 	{ UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
 	{ 0 }
 };
-static struct procunit_value_info threed_enh_proc_info[] = {
+static const struct procunit_value_info threed_enh_proc_info[] = {
 	{ UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
 	{ UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
 	{ 0 }
 };
-static struct procunit_value_info reverb_proc_info[] = {
+static const struct procunit_value_info reverb_proc_info[] = {
 	{ UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
 	{ UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
 	{ UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
 	{ UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
 	{ 0 }
 };
-static struct procunit_value_info chorus_proc_info[] = {
+static const struct procunit_value_info chorus_proc_info[] = {
 	{ UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
 	{ UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
 	{ UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
 	{ UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
 	{ 0 }
 };
-static struct procunit_value_info dcr_proc_info[] = {
+static const struct procunit_value_info dcr_proc_info[] = {
 	{ UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
 	{ UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
 	{ UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
@@ -2253,7 +2253,7 @@ static struct procunit_value_info dcr_proc_info[] = {
 	{ 0 }
 };
 
-static struct procunit_info procunits[] = {
+static const struct procunit_info procunits[] = {
 	{ UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
 	{ UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
 	{ UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
@@ -2263,16 +2263,16 @@ static struct procunit_info procunits[] = {
 	{ 0 },
 };
 
-static struct procunit_value_info uac3_updown_proc_info[] = {
+static const struct procunit_value_info uac3_updown_proc_info[] = {
 	{ UAC3_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
 	{ 0 }
 };
-static struct procunit_value_info uac3_stereo_ext_proc_info[] = {
+static const struct procunit_value_info uac3_stereo_ext_proc_info[] = {
 	{ UAC3_EXT_WIDTH_CONTROL, "Width Control", USB_MIXER_U8 },
 	{ 0 }
 };
 
-static struct procunit_info uac3_procunits[] = {
+static const struct procunit_info uac3_procunits[] = {
 	{ UAC3_PROCESS_UP_DOWNMIX, "Up Down", uac3_updown_proc_info },
 	{ UAC3_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", uac3_stereo_ext_proc_info },
 	{ UAC3_PROCESS_MULTI_FUNCTION, "Multi-Function", undefined_proc_info },
@@ -2282,23 +2282,23 @@ static struct procunit_info uac3_procunits[] = {
 /*
  * predefined data for extension units
  */
-static struct procunit_value_info clock_rate_xu_info[] = {
+static const struct procunit_value_info clock_rate_xu_info[] = {
 	{ USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
 	{ 0 }
 };
-static struct procunit_value_info clock_source_xu_info[] = {
+static const struct procunit_value_info clock_source_xu_info[] = {
 	{ USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
 	{ 0 }
 };
-static struct procunit_value_info spdif_format_xu_info[] = {
+static const struct procunit_value_info spdif_format_xu_info[] = {
 	{ USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
 	{ 0 }
 };
-static struct procunit_value_info soft_limit_xu_info[] = {
+static const struct procunit_value_info soft_limit_xu_info[] = {
 	{ USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
 	{ 0 }
 };
-static struct procunit_info extunits[] = {
+static const struct procunit_info extunits[] = {
 	{ USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
 	{ USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
 	{ USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
@@ -2310,7 +2310,7 @@ static struct procunit_info extunits[] = {
  * build a processing/extension unit
  */
 static int build_audio_procunit(struct mixer_build *state, int unitid,
-				void *raw_desc, struct procunit_info *list,
+				void *raw_desc, const struct procunit_info *list,
 				bool extension_unit)
 {
 	struct uac_processing_unit_descriptor *desc = raw_desc;
@@ -2318,14 +2318,14 @@ static int build_audio_procunit(struct mixer_build *state, int unitid,
 	struct usb_mixer_elem_info *cval;
 	struct snd_kcontrol *kctl;
 	int i, err, nameid, type, len;
-	struct procunit_info *info;
-	struct procunit_value_info *valinfo;
+	const struct procunit_info *info;
+	const struct procunit_value_info *valinfo;
 	const struct usbmix_name_map *map;
-	static struct procunit_value_info default_value_info[] = {
+	static const struct procunit_value_info default_value_info[] = {
 		{ 0x01, "Switch", USB_MIXER_BOOLEAN },
 		{ 0 }
 	};
-	static struct procunit_info default_info = {
+	static const struct procunit_info default_info = {
 		0, NULL, default_value_info
 	};
 	const char *name = extension_unit ?
@@ -2803,7 +2803,7 @@ struct uac3_badd_profile {
 	int st_chmask;	/* side tone mixing channel mask */
 };
 
-static struct uac3_badd_profile uac3_badd_profiles[] = {
+static const struct uac3_badd_profile uac3_badd_profiles[] = {
 	{
 		/*
 		 * BAIF, BAOF or combination of both
@@ -2864,7 +2864,7 @@ static struct uac3_badd_profile uac3_badd_profiles[] = {
 };
 
 static bool uac3_badd_func_has_valid_channels(struct usb_mixer_interface *mixer,
-					      struct uac3_badd_profile *f,
+					      const struct uac3_badd_profile *f,
 					      int c_chmask, int p_chmask)
 {
 	/*
@@ -2908,7 +2908,7 @@ static int snd_usb_mixer_controls_badd(struct usb_mixer_interface *mixer,
 	struct usb_device *dev = mixer->chip->dev;
 	struct usb_interface_assoc_descriptor *assoc;
 	int badd_profile = mixer->chip->badd_profile;
-	struct uac3_badd_profile *f;
+	const struct uac3_badd_profile *f;
 	const struct usbmix_ctl_map *map;
 	int p_chmask = 0, c_chmask = 0, st_chmask = 0;
 	int i;
@@ -3174,7 +3174,7 @@ static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
 				    struct usb_mixer_elem_list *list)
 {
 	struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list);
-	static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
+	static const char * const val_types[] = {"BOOLEAN", "INV_BOOLEAN",
 				    "S8", "U8", "S16", "U16"};
 	snd_iprintf(buffer, "    Info: id=%i, control=%i, cmask=0x%x, "
 			    "channels=%i, type=\"%s\"\n", cval->head.id,
@@ -3407,7 +3407,7 @@ static int create_keep_iface_ctl(struct usb_mixer_interface *mixer)
 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
 			 int ignore_error)
 {
-	static struct snd_device_ops dev_ops = {
+	static const struct snd_device_ops dev_ops = {
 		.dev_free = snd_usb_mixer_dev_free
 	};
 	struct usb_mixer_interface *mixer;
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index 37e1b234c802..65d6d08c96f5 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -116,6 +116,6 @@ int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
 
 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
 
-extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
+extern const struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
 
 #endif /* __USBMIXER_H */
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index 73baf398c84a..5ebca8013840 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -14,7 +14,7 @@ struct usbmix_name_map {
 	int id;
 	const char *name;
 	int control;
-	struct usbmix_dB_map *dB;
+	const struct usbmix_dB_map *dB;
 };
 
 struct usbmix_selector_map {
@@ -52,7 +52,7 @@ Mic-IN[9] --+->FU[10]----------------------------+                  |
            ++--+->SU[11]-->FU[12] --------------------------------------------------------------------------------------> USB_OUT[13]
 */
 
-static struct usbmix_name_map extigy_map[] = {
+static const struct usbmix_name_map extigy_map[] = {
 	/* 1: IT pcm */
 	{ 2, "PCM Playback" }, /* FU */
 	/* 3: IT pcm */
@@ -93,12 +93,12 @@ static struct usbmix_name_map extigy_map[] = {
  * e.g. no Master and fake PCM volume
  *			Pavel Mihaylov <bin@bash.info>
  */
-static struct usbmix_dB_map mp3plus_dB_1 = {.min = -4781, .max = 0};
+static const struct usbmix_dB_map mp3plus_dB_1 = {.min = -4781, .max = 0};
 						/* just guess */
-static struct usbmix_dB_map mp3plus_dB_2 = {.min = -1781, .max = 618};
+static const struct usbmix_dB_map mp3plus_dB_2 = {.min = -1781, .max = 618};
 						/* just guess */
 
-static struct usbmix_name_map mp3plus_map[] = {
+static const struct usbmix_name_map mp3plus_map[] = {
 	/* 1: IT pcm */
 	/* 2: IT mic */
 	/* 3: IT line */
@@ -139,7 +139,7 @@ Lin_IN[7]-+--->FU[8]---+              +->EU[23]->FU[28]------------->Spk_OUT[19]
             |                                              ^
             +->FU[13]--------------------------------------+
 */
-static struct usbmix_name_map audigy2nx_map[] = {
+static const struct usbmix_name_map audigy2nx_map[] = {
 	/* 1: IT pcm playback */
 	/* 4: IT digital in */
 	{ 6, "Digital In Playback" }, /* FU */
@@ -167,12 +167,12 @@ static struct usbmix_name_map audigy2nx_map[] = {
 	{ 0 } /* terminator */
 };
 
-static struct usbmix_name_map mbox1_map[] = {
+static const struct usbmix_name_map mbox1_map[] = {
 	{ 1, "Clock" },
 	{ 0 } /* terminator */
 };
 
-static struct usbmix_selector_map c400_selectors[] = {
+static const struct usbmix_selector_map c400_selectors[] = {
 	{
 		.id = 0x80,
 		.count = 2,
@@ -181,7 +181,7 @@ static struct usbmix_selector_map c400_selectors[] = {
 	{ 0 } /* terminator */
 };
 
-static struct usbmix_selector_map audigy2nx_selectors[] = {
+static const struct usbmix_selector_map audigy2nx_selectors[] = {
 	{
 		.id = 14, /* Capture Source */
 		.count = 3,
@@ -201,21 +201,21 @@ static struct usbmix_selector_map audigy2nx_selectors[] = {
 };
 
 /* Creative SoundBlaster Live! 24-bit External */
-static struct usbmix_name_map live24ext_map[] = {
+static const struct usbmix_name_map live24ext_map[] = {
 	/* 2: PCM Playback Volume */
 	{ 5, "Mic Capture" }, /* FU, default PCM Capture Volume */
 	{ 0 } /* terminator */
 };
 
 /* LineX FM Transmitter entry - needed to bypass controls bug */
-static struct usbmix_name_map linex_map[] = {
+static const struct usbmix_name_map linex_map[] = {
 	/* 1: IT pcm */
 	/* 2: OT Speaker */ 
 	{ 3, "Master" }, /* FU: master volume - left / right / mute */
 	{ 0 } /* terminator */
 };
 
-static struct usbmix_name_map maya44_map[] = {
+static const struct usbmix_name_map maya44_map[] = {
 	/* 1: IT line */
 	{ 2, "Line Playback" }, /* FU */
 	/* 3: IT line */
@@ -238,7 +238,7 @@ static struct usbmix_name_map maya44_map[] = {
  * so this map removes all unwanted sliders from alsamixer
  */
 
-static struct usbmix_name_map justlink_map[] = {
+static const struct usbmix_name_map justlink_map[] = {
 	/* 1: IT pcm playback */
 	/* 2: Not present */
 	{ 3, NULL}, /* IT mic (No mic input on device) */
@@ -255,7 +255,7 @@ static struct usbmix_name_map justlink_map[] = {
 };
 
 /* TerraTec Aureon 5.1 MkII USB */
-static struct usbmix_name_map aureon_51_2_map[] = {
+static const struct usbmix_name_map aureon_51_2_map[] = {
 	/* 1: IT USB */
 	/* 2: IT Mic */
 	/* 3: IT Line */
@@ -274,7 +274,7 @@ static struct usbmix_name_map aureon_51_2_map[] = {
 	{} /* terminator */
 };
 
-static struct usbmix_name_map scratch_live_map[] = {
+static const struct usbmix_name_map scratch_live_map[] = {
 	/* 1: IT Line 1 (USB streaming) */
 	/* 2: OT Line 1 (Speaker) */
 	/* 3: IT Line 1 (Line connector) */
@@ -290,7 +290,7 @@ static struct usbmix_name_map scratch_live_map[] = {
 	{ 0 } /* terminator */
 };
 
-static struct usbmix_name_map ebox44_map[] = {
+static const struct usbmix_name_map ebox44_map[] = {
 	{ 4, NULL }, /* FU */
 	{ 6, NULL }, /* MU */
 	{ 7, NULL }, /* FU */
@@ -305,7 +305,7 @@ static struct usbmix_name_map ebox44_map[] = {
  *  FIXME: or mp3plus_map should use "Capture Source" too,
  *  so this maps can be merget
  */
-static struct usbmix_name_map hercules_usb51_map[] = {
+static const struct usbmix_name_map hercules_usb51_map[] = {
 	{ 8, "Capture Source" },	/* SU, default "PCM Capture Source" */
 	{ 9, "Master Playback" },	/* FU, default "Speaker Playback" */
 	{ 10, "Mic Boost", 7 },		/* FU, default "Auto Gain Input" */
@@ -316,7 +316,7 @@ static struct usbmix_name_map hercules_usb51_map[] = {
 };
 
 /* Plantronics Gamecom 780 has a broken volume control, better to disable it */
-static struct usbmix_name_map gamecom780_map[] = {
+static const struct usbmix_name_map gamecom780_map[] = {
 	{ 9, NULL }, /* FU, speaker out */
 	{}
 };
@@ -330,8 +330,8 @@ static const struct usbmix_name_map scms_usb3318_map[] = {
 };
 
 /* Bose companion 5, the dB conversion factor is 16 instead of 256 */
-static struct usbmix_dB_map bose_companion5_dB = {-5006, -6};
-static struct usbmix_name_map bose_companion5_map[] = {
+static const struct usbmix_dB_map bose_companion5_dB = {-5006, -6};
+static const struct usbmix_name_map bose_companion5_map[] = {
 	{ 3, NULL, .dB = &bose_companion5_dB },
 	{ 0 }	/* terminator */
 };
@@ -350,10 +350,20 @@ static const struct usbmix_name_map dell_alc4020_map[] = {
 };
 
 /*
+ * Corsair Virtuoso calls everything "Headset" without this, leading to
+ * applications moving the sidetone control instead of the main one.
+ */
+static const struct usbmix_name_map corsair_virtuoso_map[] = {
+	{ 3, "Mic Capture" },
+	{ 6, "Sidetone Playback" },
+	{ 0 }
+};
+
+/*
  * Control map entries
  */
 
-static struct usbmix_ctl_map usbmix_ctl_maps[] = {
+static const struct usbmix_ctl_map usbmix_ctl_maps[] = {
 	{
 		.id = USB_ID(0x041e, 0x3000),
 		.map = extigy_map,
@@ -468,6 +478,16 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
 		.id = USB_ID(0x05a7, 0x1020),
 		.map = bose_companion5_map,
 	},
+	{
+		/* Corsair Virtuoso (wired mode) */
+		.id = USB_ID(0x1b1c, 0x0a41),
+		.map = corsair_virtuoso_map,
+	},
+	{
+		/* Corsair Virtuoso (wireless mode) */
+		.id = USB_ID(0x1b1c, 0x0a42),
+		.map = corsair_virtuoso_map,
+	},
 	{ 0 } /* terminator */
 };
 
@@ -475,37 +495,37 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
  * Control map entries for UAC3 BADD profiles
  */
 
-static struct usbmix_name_map uac3_badd_generic_io_map[] = {
+static const struct usbmix_name_map uac3_badd_generic_io_map[] = {
 	{ UAC3_BADD_FU_ID2, "Generic Out Playback" },
 	{ UAC3_BADD_FU_ID5, "Generic In Capture" },
 	{ 0 }					/* terminator */
 };
-static struct usbmix_name_map uac3_badd_headphone_map[] = {
+static const struct usbmix_name_map uac3_badd_headphone_map[] = {
 	{ UAC3_BADD_FU_ID2, "Headphone Playback" },
 	{ 0 }					/* terminator */
 };
-static struct usbmix_name_map uac3_badd_speaker_map[] = {
+static const struct usbmix_name_map uac3_badd_speaker_map[] = {
 	{ UAC3_BADD_FU_ID2, "Speaker Playback" },
 	{ 0 }					/* terminator */
 };
-static struct usbmix_name_map uac3_badd_microphone_map[] = {
+static const struct usbmix_name_map uac3_badd_microphone_map[] = {
 	{ UAC3_BADD_FU_ID5, "Mic Capture" },
 	{ 0 }					/* terminator */
 };
 /* Covers also 'headset adapter' profile */
-static struct usbmix_name_map uac3_badd_headset_map[] = {
+static const struct usbmix_name_map uac3_badd_headset_map[] = {
 	{ UAC3_BADD_FU_ID2, "Headset Playback" },
 	{ UAC3_BADD_FU_ID5, "Headset Capture" },
 	{ UAC3_BADD_FU_ID7, "Sidetone Mixing" },
 	{ 0 }					/* terminator */
 };
-static struct usbmix_name_map uac3_badd_speakerphone_map[] = {
+static const struct usbmix_name_map uac3_badd_speakerphone_map[] = {
 	{ UAC3_BADD_FU_ID2, "Speaker Playback" },
 	{ UAC3_BADD_FU_ID5, "Mic Capture" },
 	{ 0 }					/* terminator */
 };
 
-static struct usbmix_ctl_map uac3_badd_usbmix_ctl_maps[] = {
+static const struct usbmix_ctl_map uac3_badd_usbmix_ctl_maps[] = {
 	{
 		.id = UAC3_FUNCTION_SUBCLASS_GENERIC_IO,
 		.map = uac3_badd_generic_io_map,
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index 39e27ae6c597..c237e24f08d9 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -119,7 +119,7 @@ static int snd_create_std_mono_ctl(struct usb_mixer_interface *mixer,
  * Create a set of standard UAC controls from a table
  */
 static int snd_create_std_mono_table(struct usb_mixer_interface *mixer,
-				struct std_mono_table *t)
+				     const struct std_mono_table *t)
 {
 	int err;
 
@@ -507,7 +507,7 @@ static int snd_emu0204_ch_switch_resume(struct usb_mixer_elem_list *list)
 					    list->kctl->private_value);
 }
 
-static struct snd_kcontrol_new snd_emu0204_control = {
+static const struct snd_kcontrol_new snd_emu0204_control = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Front Jack Channels",
 	.info = snd_emu0204_ch_switch_info,
@@ -575,7 +575,7 @@ static int snd_xonar_u1_switch_resume(struct usb_mixer_elem_list *list)
 					  list->kctl->private_value);
 }
 
-static struct snd_kcontrol_new snd_xonar_u1_output_switch = {
+static const struct snd_kcontrol_new snd_xonar_u1_output_switch = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Digital Playback Switch",
 	.info = snd_ctl_boolean_mono_info,
@@ -702,7 +702,7 @@ static int snd_mbox1_switch_resume(struct usb_mixer_elem_list *list)
 	return snd_mbox1_switch_update(list->mixer, list->kctl->private_value);
 }
 
-static struct snd_kcontrol_new snd_mbox1_switch = {
+static const struct snd_kcontrol_new snd_mbox1_switch = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Clock Source",
 	.index = 0,
@@ -787,7 +787,7 @@ static int snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
 	return err < 0 ? err : 1;
 }
 
-static struct snd_kcontrol_new snd_nativeinstruments_ta6_mixers[] = {
+static const struct snd_kcontrol_new snd_nativeinstruments_ta6_mixers[] = {
 	{
 		.name = "Direct Thru Channel A",
 		.private_value = _MAKE_NI_CONTROL(0x01, 0x03),
@@ -806,7 +806,7 @@ static struct snd_kcontrol_new snd_nativeinstruments_ta6_mixers[] = {
 	},
 };
 
-static struct snd_kcontrol_new snd_nativeinstruments_ta10_mixers[] = {
+static const struct snd_kcontrol_new snd_nativeinstruments_ta10_mixers[] = {
 	{
 		.name = "Direct Thru Channel A",
 		.private_value = _MAKE_NI_CONTROL(0x01, 0x03),
@@ -1386,7 +1386,7 @@ static int snd_c400_create_mixer(struct usb_mixer_interface *mixer)
  * are valid they presents mono controls as L and R channels of
  * stereo. So we provide a good mixer here.
  */
-static struct std_mono_table ebox44_table[] = {
+static const struct std_mono_table ebox44_table[] = {
 	{
 		.unitid = 4,
 		.control = 1,
@@ -1662,7 +1662,7 @@ static int snd_microii_spdif_switch_put(struct snd_kcontrol *kcontrol,
 	return err < 0 ? err : 1;
 }
 
-static struct snd_kcontrol_new snd_microii_mixer_spdif[] = {
+static const struct snd_kcontrol_new snd_microii_mixer_spdif[] = {
 	{
 		.iface =    SNDRV_CTL_ELEM_IFACE_PCM,
 		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
@@ -1691,7 +1691,7 @@ static struct snd_kcontrol_new snd_microii_mixer_spdif[] = {
 static int snd_microii_controls_create(struct usb_mixer_interface *mixer)
 {
 	int err, i;
-	static usb_mixer_elem_resume_func_t resume_funcs[] = {
+	static const usb_mixer_elem_resume_func_t resume_funcs[] = {
 		snd_microii_spdif_default_update,
 		NULL,
 		snd_microii_spdif_switch_update
@@ -1769,7 +1769,7 @@ static int snd_soundblaster_e1_switch_info(struct snd_kcontrol *kcontrol,
 	return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
 }
 
-static struct snd_kcontrol_new snd_soundblaster_e1_input_switch = {
+static const struct snd_kcontrol_new snd_soundblaster_e1_input_switch = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Input Source",
 	.info = snd_soundblaster_e1_switch_info,
@@ -2093,7 +2093,7 @@ static int snd_rme_sync_source_info(struct snd_kcontrol *kcontrol,
 				 ARRAY_SIZE(sync_sources), sync_sources);
 }
 
-static struct snd_kcontrol_new snd_rme_controls[] = {
+static const struct snd_kcontrol_new snd_rme_controls[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = "AES Rate",
diff --git a/sound/usb/mixer_scarlett.c b/sound/usb/mixer_scarlett.c
index 9d10cbf1b5ed..49fcd2505443 100644
--- a/sound/usb/mixer_scarlett.c
+++ b/sound/usb/mixer_scarlett.c
@@ -633,7 +633,7 @@ static int add_output_ctls(struct usb_mixer_interface *mixer,
 /********************** device-specific config *************************/
 
 /*  untested...  */
-static struct scarlett_device_info s6i6_info = {
+static const struct scarlett_device_info s6i6_info = {
 	.matrix_in = 18,
 	.matrix_out = 8,
 	.input_len = 6,
@@ -675,7 +675,7 @@ static struct scarlett_device_info s6i6_info = {
 };
 
 /*  untested...  */
-static struct scarlett_device_info s8i6_info = {
+static const struct scarlett_device_info s8i6_info = {
 	.matrix_in = 18,
 	.matrix_out = 6,
 	.input_len = 8,
@@ -714,7 +714,7 @@ static struct scarlett_device_info s8i6_info = {
 	}
 };
 
-static struct scarlett_device_info s18i6_info = {
+static const struct scarlett_device_info s18i6_info = {
 	.matrix_in = 18,
 	.matrix_out = 6,
 	.input_len = 18,
@@ -751,7 +751,7 @@ static struct scarlett_device_info s18i6_info = {
 	}
 };
 
-static struct scarlett_device_info s18i8_info = {
+static const struct scarlett_device_info s18i8_info = {
 	.matrix_in = 18,
 	.matrix_out = 8,
 	.input_len = 18,
@@ -793,7 +793,7 @@ static struct scarlett_device_info s18i8_info = {
 	}
 };
 
-static struct scarlett_device_info s18i20_info = {
+static const struct scarlett_device_info s18i20_info = {
 	.matrix_in = 18,
 	.matrix_out = 8,
 	.input_len = 18,
@@ -843,7 +843,7 @@ static struct scarlett_device_info s18i20_info = {
 
 
 static int scarlett_controls_create_generic(struct usb_mixer_interface *mixer,
-	struct scarlett_device_info *info)
+	const struct scarlett_device_info *info)
 {
 	int i, err;
 	char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
@@ -915,7 +915,7 @@ int snd_scarlett_controls_create(struct usb_mixer_interface *mixer)
 {
 	int err, i, o;
 	char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
-	struct scarlett_device_info *info;
+	const struct scarlett_device_info *info;
 	struct usb_mixer_elem_info *elem;
 	static char sample_rate_buffer[4] = { '\x80', '\xbb', '\x00', '\x00' };
 
diff --git a/sound/usb/mixer_us16x08.c b/sound/usb/mixer_us16x08.c
index f0e8e1539450..986145fd2ce0 100644
--- a/sound/usb/mixer_us16x08.c
+++ b/sound/usb/mixer_us16x08.c
@@ -760,7 +760,7 @@ static int snd_us16x08_meter_put(struct snd_kcontrol *kcontrol,
 	return 1;
 }
 
-static struct snd_kcontrol_new snd_us16x08_ch_boolean_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_ch_boolean_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -770,7 +770,7 @@ static struct snd_kcontrol_new snd_us16x08_ch_boolean_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 1)
 };
 
-static struct snd_kcontrol_new snd_us16x08_ch_int_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_ch_int_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -780,7 +780,7 @@ static struct snd_kcontrol_new snd_us16x08_ch_int_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_FADER_BIAS, 1, 0, 133)
 };
 
-static struct snd_kcontrol_new snd_us16x08_pan_int_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_pan_int_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -790,7 +790,7 @@ static struct snd_kcontrol_new snd_us16x08_pan_int_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_FADER_BIAS, 1, 0, 255)
 };
 
-static struct snd_kcontrol_new snd_us16x08_master_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_master_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 1,
@@ -800,7 +800,7 @@ static struct snd_kcontrol_new snd_us16x08_master_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_FADER_BIAS, 1, 0, 133)
 };
 
-static struct snd_kcontrol_new snd_us16x08_route_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_route_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 8,
@@ -810,7 +810,7 @@ static struct snd_kcontrol_new snd_us16x08_route_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 9)
 };
 
-static struct snd_kcontrol_new snd_us16x08_bus_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_bus_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 1,
@@ -820,7 +820,7 @@ static struct snd_kcontrol_new snd_us16x08_bus_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 1)
 };
 
-static struct snd_kcontrol_new snd_us16x08_compswitch_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_compswitch_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -830,7 +830,7 @@ static struct snd_kcontrol_new snd_us16x08_compswitch_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 1)
 };
 
-static struct snd_kcontrol_new snd_us16x08_comp_threshold_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_comp_threshold_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -841,7 +841,7 @@ static struct snd_kcontrol_new snd_us16x08_comp_threshold_ctl = {
 	0, 0x20)
 };
 
-static struct snd_kcontrol_new snd_us16x08_comp_ratio_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_comp_ratio_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -852,7 +852,7 @@ static struct snd_kcontrol_new snd_us16x08_comp_ratio_ctl = {
 	sizeof(ratio_map) - 1), /*max*/
 };
 
-static struct snd_kcontrol_new snd_us16x08_comp_gain_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_comp_gain_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -862,7 +862,7 @@ static struct snd_kcontrol_new snd_us16x08_comp_gain_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 0x14)
 };
 
-static struct snd_kcontrol_new snd_us16x08_comp_attack_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_comp_attack_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -873,7 +873,7 @@ static struct snd_kcontrol_new snd_us16x08_comp_attack_ctl = {
 	SND_US16X08_KCSET(SND_US16X08_COMP_ATTACK_BIAS, 1, 0, 0xc6),
 };
 
-static struct snd_kcontrol_new snd_us16x08_comp_release_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_comp_release_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -884,7 +884,7 @@ static struct snd_kcontrol_new snd_us16x08_comp_release_ctl = {
 	SND_US16X08_KCSET(SND_US16X08_COMP_RELEASE_BIAS, 1, 0, 0x63),
 };
 
-static struct snd_kcontrol_new snd_us16x08_eq_gain_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_eq_gain_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -894,7 +894,7 @@ static struct snd_kcontrol_new snd_us16x08_eq_gain_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 24),
 };
 
-static struct snd_kcontrol_new snd_us16x08_eq_low_freq_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_eq_low_freq_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -904,7 +904,7 @@ static struct snd_kcontrol_new snd_us16x08_eq_low_freq_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 0x1F),
 };
 
-static struct snd_kcontrol_new snd_us16x08_eq_mid_freq_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_eq_mid_freq_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -914,7 +914,7 @@ static struct snd_kcontrol_new snd_us16x08_eq_mid_freq_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 0x3F)
 };
 
-static struct snd_kcontrol_new snd_us16x08_eq_mid_width_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_eq_mid_width_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -924,7 +924,7 @@ static struct snd_kcontrol_new snd_us16x08_eq_mid_width_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 0x06)
 };
 
-static struct snd_kcontrol_new snd_us16x08_eq_high_freq_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_eq_high_freq_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -935,7 +935,7 @@ static struct snd_kcontrol_new snd_us16x08_eq_high_freq_ctl = {
 	SND_US16X08_KCSET(SND_US16X08_EQ_HIGHFREQ_BIAS, 1, 0, 0x1F)
 };
 
-static struct snd_kcontrol_new snd_us16x08_eq_switch_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_eq_switch_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 16,
@@ -945,7 +945,7 @@ static struct snd_kcontrol_new snd_us16x08_eq_switch_ctl = {
 	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 1)
 };
 
-static struct snd_kcontrol_new snd_us16x08_meter_ctl = {
+static const struct snd_kcontrol_new snd_us16x08_meter_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.count = 1,
diff --git a/sound/usb/mixer_us16x08.h b/sound/usb/mixer_us16x08.h
index 56ff16c0698f..7b8583dd3b07 100644
--- a/sound/usb/mixer_us16x08.h
+++ b/sound/usb/mixer_us16x08.h
@@ -108,7 +108,7 @@ struct snd_us16x08_meter_store {
 };
 
 struct snd_us16x08_control_params {
-	struct snd_kcontrol_new *kcontrol_new;
+	const struct snd_kcontrol_new *kcontrol_new;
 	int control_id;
 	int type;
 	int num_channels;
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 0e4eab96e23e..bd258f1ec2dd 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -260,18 +260,31 @@ static int start_endpoints(struct snd_usb_substream *subs)
 	return 0;
 }
 
-static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
+static void sync_pending_stops(struct snd_usb_substream *subs)
+{
+	snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
+	snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
+}
+
+static void stop_endpoints(struct snd_usb_substream *subs)
 {
 	if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
 		snd_usb_endpoint_stop(subs->sync_endpoint);
 
 	if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
 		snd_usb_endpoint_stop(subs->data_endpoint);
+}
 
-	if (wait) {
-		snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
-		snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
+/* PCM sync_stop callback */
+static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream)
+{
+	struct snd_usb_substream *subs = substream->runtime->private_data;
+
+	if (!snd_usb_lock_shutdown(subs->stream->chip)) {
+		sync_pending_stops(subs);
+		snd_usb_unlock_shutdown(subs->stream->chip);
 	}
+	return 0;
 }
 
 static int search_roland_implicit_fb(struct usb_device *dev, int ifnum,
@@ -348,6 +361,10 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 		ep = 0x84;
 		ifnum = 0;
 		goto add_sync_ep_from_ifnum;
+	case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
+		ep = 0x81;
+		ifnum = 2;
+		goto add_sync_ep_from_ifnum;
 	case USB_ID(0x0582, 0x01d8): /* BOSS Katana */
 		/* BOSS Katana amplifiers do not need quirks */
 		return 0;
@@ -700,7 +717,8 @@ static int configure_endpoint(struct snd_usb_substream *subs)
 	int ret;
 
 	/* format changed */
-	stop_endpoints(subs, true);
+	stop_endpoints(subs);
+	sync_pending_stops(subs);
 	ret = snd_usb_endpoint_set_params(subs->data_endpoint,
 					  subs->pcm_format,
 					  subs->channels,
@@ -788,11 +806,6 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
 	if (ret)
 		return ret;
 
-	ret = snd_pcm_lib_malloc_pages(substream,
-				       params_buffer_bytes(hw_params));
-	if (ret < 0)
-		goto stop_pipeline;
-
 	subs->pcm_format = params_format(hw_params);
 	subs->period_bytes = params_period_bytes(hw_params);
 	subs->period_frames = params_period_size(hw_params);
@@ -850,13 +863,14 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
 	subs->cur_rate = 0;
 	subs->period_bytes = 0;
 	if (!snd_usb_lock_shutdown(subs->stream->chip)) {
-		stop_endpoints(subs, true);
+		stop_endpoints(subs);
+		sync_pending_stops(subs);
 		snd_usb_endpoint_deactivate(subs->sync_endpoint);
 		snd_usb_endpoint_deactivate(subs->data_endpoint);
 		snd_usb_unlock_shutdown(subs->stream->chip);
 	}
 
-	return snd_pcm_lib_free_pages(substream);
+	return 0;
 }
 
 /*
@@ -885,9 +899,6 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
 		goto unlock;
 	}
 
-	snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
-	snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
-
 	ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0);
 	if (ret < 0)
 		goto unlock;
@@ -1345,7 +1356,6 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream)
 	struct snd_usb_substream *subs = &as->substream[direction];
 	int ret;
 
-	stop_endpoints(subs, true);
 	snd_media_stop_pipeline(subs);
 
 	if (!as->chip->keep_iface &&
@@ -1722,7 +1732,7 @@ static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substrea
 		subs->running = 1;
 		return 0;
 	case SNDRV_PCM_TRIGGER_STOP:
-		stop_endpoints(subs, false);
+		stop_endpoints(subs);
 		subs->running = 0;
 		return 0;
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
@@ -1733,7 +1743,7 @@ static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substrea
 		return 0;
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 		if (subs->stream->chip->setup_fmt_after_resume_quirk) {
-			stop_endpoints(subs, true);
+			stop_endpoints(subs);
 			subs->need_setup_fmt = true;
 			return 0;
 		}
@@ -1759,7 +1769,7 @@ static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream
 		subs->running = 1;
 		return 0;
 	case SNDRV_PCM_TRIGGER_STOP:
-		stop_endpoints(subs, false);
+		stop_endpoints(subs);
 		subs->running = 0;
 		return 0;
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
@@ -1772,7 +1782,7 @@ static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream
 		return 0;
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 		if (subs->stream->chip->setup_fmt_after_resume_quirk) {
-			stop_endpoints(subs, true);
+			stop_endpoints(subs);
 			subs->need_setup_fmt = true;
 			return 0;
 		}
@@ -1785,22 +1795,22 @@ static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream
 static const struct snd_pcm_ops snd_usb_playback_ops = {
 	.open =		snd_usb_pcm_open,
 	.close =	snd_usb_pcm_close,
-	.ioctl =	snd_pcm_lib_ioctl,
 	.hw_params =	snd_usb_hw_params,
 	.hw_free =	snd_usb_hw_free,
 	.prepare =	snd_usb_pcm_prepare,
 	.trigger =	snd_usb_substream_playback_trigger,
+	.sync_stop =	snd_usb_pcm_sync_stop,
 	.pointer =	snd_usb_pcm_pointer,
 };
 
 static const struct snd_pcm_ops snd_usb_capture_ops = {
 	.open =		snd_usb_pcm_open,
 	.close =	snd_usb_pcm_close,
-	.ioctl =	snd_pcm_lib_ioctl,
 	.hw_params =	snd_usb_hw_params,
 	.hw_free =	snd_usb_hw_free,
 	.prepare =	snd_usb_pcm_prepare,
 	.trigger =	snd_usb_substream_capture_trigger,
+	.sync_stop =	snd_usb_pcm_sync_stop,
 	.pointer =	snd_usb_pcm_pointer,
 };
 
@@ -1820,9 +1830,9 @@ void snd_usb_preallocate_buffer(struct snd_usb_substream *subs)
 	struct device *dev = subs->dev->bus->controller;
 
 	if (snd_usb_use_vmalloc)
-		snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_VMALLOC,
-					      NULL, 0, 0);
+		snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_VMALLOC,
+					   NULL, 0, 0);
 	else
-		snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_DEV_SG,
-					      dev, 64*1024, 512*1024);
+		snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_DEV_SG,
+					   dev, 64*1024, 512*1024);
 }
diff --git a/sound/usb/proc.c b/sound/usb/proc.c
index 49e3f176aaf5..ffbf4bd9208c 100644
--- a/sound/usb/proc.c
+++ b/sound/usb/proc.c
@@ -60,7 +60,7 @@ void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
 static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
 {
 	struct audioformat *fp;
-	static char *sync_types[4] = {
+	static const char * const sync_types[4] = {
 		"NONE", "ASYNC", "ADAPTIVE", "SYNC"
 	};
 
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 82184036437b..3a5242e383b2 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1113,6 +1113,31 @@ free_buf:
 	return err;
 }
 
+static int snd_usb_motu_m_series_boot_quirk(struct usb_device *dev)
+{
+	int ret;
+
+	if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
+		return -EINVAL;
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			      1, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			      0x0, 0, NULL, 0, 1000);
+
+	if (ret < 0)
+		return ret;
+
+	msleep(2000);
+
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			      1, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			      0x20, 0, NULL, 0, 1000);
+
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
 /*
  * Setup quirks
  */
@@ -1297,6 +1322,19 @@ int snd_usb_apply_boot_quirk(struct usb_device *dev,
 	return 0;
 }
 
+int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
+				  struct usb_interface *intf,
+				  const struct snd_usb_audio_quirk *quirk,
+				  unsigned int id)
+{
+	switch (id) {
+	case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
+		return snd_usb_motu_m_series_boot_quirk(dev);
+	}
+
+	return 0;
+}
+
 /*
  * check if the device uses big-endian samples
  */
@@ -1393,22 +1431,22 @@ bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
 {
 	/* devices which do not support reading the sample rate. */
 	switch (chip->usb_id) {
-	case USB_ID(0x041E, 0x4080): /* Creative Live Cam VF0610 */
-	case USB_ID(0x04D8, 0xFEEA): /* Benchmark DAC1 Pre */
+	case USB_ID(0x041e, 0x4080): /* Creative Live Cam VF0610 */
+	case USB_ID(0x04d8, 0xfeea): /* Benchmark DAC1 Pre */
 	case USB_ID(0x0556, 0x0014): /* Phoenix Audio TMX320VC */
-	case USB_ID(0x05A3, 0x9420): /* ELP HD USB Camera */
+	case USB_ID(0x05a3, 0x9420): /* ELP HD USB Camera */
 	case USB_ID(0x05a7, 0x1020): /* Bose Companion 5 */
-	case USB_ID(0x074D, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */
+	case USB_ID(0x074d, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */
 	case USB_ID(0x1395, 0x740a): /* Sennheiser DECT */
 	case USB_ID(0x1901, 0x0191): /* GE B850V3 CP2114 audio interface */
-	case USB_ID(0x21B4, 0x0081): /* AudioQuest DragonFly */
+	case USB_ID(0x21b4, 0x0081): /* AudioQuest DragonFly */
 		return true;
 	}
 
 	/* devices of these vendors don't support reading rate, either */
 	switch (USB_ID_VENDOR(chip->usb_id)) {
-	case 0x045E: /* MS Lifecam */
-	case 0x047F: /* Plantronics */
+	case 0x045e: /* MS Lifecam */
+	case 0x047f: /* Plantronics */
 	case 0x1de7: /* Phoenix Audio */
 		return true;
 	}
diff --git a/sound/usb/quirks.h b/sound/usb/quirks.h
index a80e0ddd0736..df0355843a4c 100644
--- a/sound/usb/quirks.h
+++ b/sound/usb/quirks.h
@@ -20,6 +20,11 @@ int snd_usb_apply_boot_quirk(struct usb_device *dev,
 			     const struct snd_usb_audio_quirk *quirk,
 			     unsigned int usb_id);
 
+int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
+				  struct usb_interface *intf,
+				  const struct snd_usb_audio_quirk *quirk,
+				  unsigned int usb_id);
+
 void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
 			      struct audioformat *fmt);
 
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 11785f9652ad..afd5aa574611 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -239,7 +239,7 @@ static int add_chmap(struct snd_pcm *pcm, int stream,
 static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
 						int protocol)
 {
-	static unsigned int uac1_maps[] = {
+	static const unsigned int uac1_maps[] = {
 		SNDRV_CHMAP_FL,		/* left front */
 		SNDRV_CHMAP_FR,		/* right front */
 		SNDRV_CHMAP_FC,		/* center front */
@@ -254,7 +254,7 @@ static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
 		SNDRV_CHMAP_TC,		/* top */
 		0 /* terminator */
 	};
-	static unsigned int uac2_maps[] = {
+	static const unsigned int uac2_maps[] = {
 		SNDRV_CHMAP_FL,		/* front left */
 		SNDRV_CHMAP_FR,		/* front right */
 		SNDRV_CHMAP_FC,		/* front center */
diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c
index e82c5236482d..f86f7a61fb36 100644
--- a/sound/usb/usx2y/us122l.c
+++ b/sound/usb/usx2y/us122l.c
@@ -40,13 +40,13 @@ static int snd_us122l_card_used[SNDRV_CARDS];
 
 static int us122l_create_usbmidi(struct snd_card *card)
 {
-	static struct snd_usb_midi_endpoint_info quirk_data = {
+	static const struct snd_usb_midi_endpoint_info quirk_data = {
 		.out_ep = 4,
 		.in_ep = 3,
 		.out_cables =	0x001,
 		.in_cables =	0x001
 	};
-	static struct snd_usb_audio_quirk quirk = {
+	static const struct snd_usb_audio_quirk quirk = {
 		.vendor_name =	"US122L",
 		.product_name =	NAME_ALLCAPS,
 		.ifnum = 	1,
@@ -62,13 +62,13 @@ static int us122l_create_usbmidi(struct snd_card *card)
 
 static int us144_create_usbmidi(struct snd_card *card)
 {
-	static struct snd_usb_midi_endpoint_info quirk_data = {
+	static const struct snd_usb_midi_endpoint_info quirk_data = {
 		.out_ep = 4,
 		.in_ep = 3,
 		.out_cables =	0x001,
 		.in_cables =	0x001
 	};
-	static struct snd_usb_audio_quirk quirk = {
+	static const struct snd_usb_audio_quirk quirk = {
 		.vendor_name =	"US144",
 		.product_name =	NAME_ALLCAPS,
 		.ifnum = 	0,
diff --git a/sound/usb/usx2y/usX2Yhwdep.c b/sound/usb/usx2y/usX2Yhwdep.c
index d1caa8ed9e68..22412cd69e98 100644
--- a/sound/usb/usx2y/usX2Yhwdep.c
+++ b/sound/usb/usx2y/usX2Yhwdep.c
@@ -94,7 +94,7 @@ static __poll_t snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll
 static int snd_usX2Y_hwdep_dsp_status(struct snd_hwdep *hw,
 				      struct snd_hwdep_dsp_status *info)
 {
-	static char *type_ids[USX2Y_TYPE_NUMS] = {
+	static const char * const type_ids[USX2Y_TYPE_NUMS] = {
 		[USX2Y_TYPE_122] = "us122",
 		[USX2Y_TYPE_224] = "us224",
 		[USX2Y_TYPE_428] = "us428",
@@ -119,33 +119,33 @@ static int snd_usX2Y_hwdep_dsp_status(struct snd_hwdep *hw,
 	info->num_dsps = 2;		// 0: Prepad Data, 1: FPGA Code
 	if (us428->chip_status & USX2Y_STAT_CHIP_INIT)
 		info->chip_ready = 1;
- 	info->version = USX2Y_DRIVER_VERSION; 
+	info->version = USX2Y_DRIVER_VERSION;
 	return 0;
 }
 
 
 static int usX2Y_create_usbmidi(struct snd_card *card)
 {
-	static struct snd_usb_midi_endpoint_info quirk_data_1 = {
+	static const struct snd_usb_midi_endpoint_info quirk_data_1 = {
 		.out_ep = 0x06,
 		.in_ep = 0x06,
 		.out_cables =	0x001,
 		.in_cables =	0x001
 	};
-	static struct snd_usb_audio_quirk quirk_1 = {
+	static const struct snd_usb_audio_quirk quirk_1 = {
 		.vendor_name =	"TASCAM",
 		.product_name =	NAME_ALLCAPS,
 		.ifnum = 	0,
        		.type = QUIRK_MIDI_FIXED_ENDPOINT,
 		.data = &quirk_data_1
 	};
-	static struct snd_usb_midi_endpoint_info quirk_data_2 = {
+	static const struct snd_usb_midi_endpoint_info quirk_data_2 = {
 		.out_ep = 0x06,
 		.in_ep = 0x06,
 		.out_cables =	0x003,
 		.in_cables =	0x003
 	};
-	static struct snd_usb_audio_quirk quirk_2 = {
+	static const struct snd_usb_audio_quirk quirk_2 = {
 		.vendor_name =	"TASCAM",
 		.product_name =	"US428",
 		.ifnum = 	0,
@@ -154,7 +154,7 @@ static int usX2Y_create_usbmidi(struct snd_card *card)
 	};
 	struct usb_device *dev = usX2Y(card)->dev;
 	struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
-	struct snd_usb_audio_quirk *quirk =
+	const struct snd_usb_audio_quirk *quirk =
 		le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ?
 		&quirk_2 : &quirk_1;
 
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c
index 25a0939f410a..772f6f3ccbb1 100644
--- a/sound/usb/usx2y/usbusx2yaudio.c
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -549,7 +549,7 @@ static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
  * if sg buffer is supported on the later version of alsa, we'll follow
  * that.
  */
-static struct s_c2
+static const struct s_c2
 {
 	char c1, c2;
 }
@@ -589,7 +589,7 @@ static struct s_c2
 	{ 0x18, 0x7C},
 	{ 0x18, 0x7E}
 };
-static struct s_c2 SetRate48000[] =
+static const struct s_c2 SetRate48000[] =
 {
 	{ 0x14, 0x09},	// this line sets 48000, well actually a little less
 	{ 0x18, 0x40},	// only tascam / frontier design knows the further lines .......
@@ -642,7 +642,7 @@ static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
 	int			err = 0, i;
 	struct snd_usX2Y_urbSeq	*us = NULL;
 	int			*usbdata = NULL;
-	struct s_c2		*ra = rate == 48000 ? SetRate48000 : SetRate44100;
+	const struct s_c2	*ra = rate == 48000 ? SetRate48000 : SetRate44100;
 
 	if (usX2Y->rate != rate) {
 		us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
@@ -764,14 +764,6 @@ static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream,
 		}
 	}
 
-	err = snd_pcm_lib_malloc_pages(substream,
-				       params_buffer_bytes(hw_params));
-	if (err < 0) {
-		snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n",
-			   substream, params_buffer_bytes(hw_params), err);
-		goto error;
-	}
-
  error:
 	mutex_unlock(&usX2Y(card)->pcm_mutex);
 	return err;
@@ -806,7 +798,7 @@ static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream)
 		}
 	}
 	mutex_unlock(&subs->usX2Y->pcm_mutex);
-	return snd_pcm_lib_free_pages(substream);
+	return 0;
 }
 /*
  * prepare callback
@@ -846,7 +838,7 @@ static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream)
 	return err;
 }
 
-static struct snd_pcm_hardware snd_usX2Y_2c =
+static const struct snd_pcm_hardware snd_usX2Y_2c =
 {
 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
@@ -901,7 +893,6 @@ static const struct snd_pcm_ops snd_usX2Y_pcm_ops =
 {
 	.open =		snd_usX2Y_pcm_open,
 	.close =	snd_usX2Y_pcm_close,
-	.ioctl =	snd_pcm_lib_ioctl,
 	.hw_params =	snd_usX2Y_pcm_hw_params,
 	.hw_free =	snd_usX2Y_pcm_hw_free,
 	.prepare =	snd_usX2Y_pcm_prepare,
@@ -968,16 +959,16 @@ static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint,
 	sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->pcm_devs);
 
 	if (playback_endpoint) {
-		snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
-					      SNDRV_DMA_TYPE_CONTINUOUS,
-					      NULL,
-					      64*1024, 128*1024);
+		snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
+					   SNDRV_DMA_TYPE_CONTINUOUS,
+					   NULL,
+					   64*1024, 128*1024);
 	}
 
-	snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
-				      SNDRV_DMA_TYPE_CONTINUOUS,
-				      NULL,
-				      64*1024, 128*1024);
+	snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
+				   SNDRV_DMA_TYPE_CONTINUOUS,
+				   NULL,
+				   64*1024, 128*1024);
 	usX2Y(card)->pcm_devs++;
 
 	return 0;
diff --git a/sound/usb/usx2y/usx2yhwdeppcm.c b/sound/usb/usx2y/usx2yhwdeppcm.c
index 997493e839ee..8253669c6a7d 100644
--- a/sound/usb/usx2y/usx2yhwdeppcm.c
+++ b/sound/usb/usx2y/usx2yhwdeppcm.c
@@ -376,7 +376,7 @@ static int snd_usX2Y_usbpcm_hw_free(struct snd_pcm_substream *substream)
 		}
 	}
 	mutex_unlock(&subs->usX2Y->pcm_mutex);
-	return snd_pcm_lib_free_pages(substream);
+	return 0;
 }
 
 static void usX2Y_usbpcm_subs_startup(struct snd_usX2Y_substream *subs)
@@ -528,7 +528,7 @@ static int snd_usX2Y_usbpcm_prepare(struct snd_pcm_substream *substream)
 	return err;
 }
 
-static struct snd_pcm_hardware snd_usX2Y_4c =
+static const struct snd_pcm_hardware snd_usX2Y_4c =
 {
 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
@@ -581,7 +581,6 @@ static const struct snd_pcm_ops snd_usX2Y_usbpcm_ops =
 {
 	.open =		snd_usX2Y_usbpcm_open,
 	.close =	snd_usX2Y_usbpcm_close,
-	.ioctl =	snd_pcm_lib_ioctl,
 	.hw_params =	snd_usX2Y_pcm_hw_params,
 	.hw_free =	snd_usX2Y_usbpcm_hw_free,
 	.prepare =	snd_usX2Y_usbpcm_prepare,
@@ -726,14 +725,14 @@ int usX2Y_hwdep_pcm_new(struct snd_card *card)
 	pcm->info_flags = 0;
 
 	sprintf(pcm->name, NAME_ALLCAPS" hwdep Audio");
-	snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
-				      SNDRV_DMA_TYPE_CONTINUOUS,
-				      NULL,
-				      64*1024, 128*1024);
-	snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
-				      SNDRV_DMA_TYPE_CONTINUOUS,
-				      NULL,
-				      64*1024, 128*1024);
+	snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
+				   SNDRV_DMA_TYPE_CONTINUOUS,
+				   NULL,
+				   64*1024, 128*1024);
+	snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
+				   SNDRV_DMA_TYPE_CONTINUOUS,
+				   NULL,
+				   64*1024, 128*1024);
 
 	return 0;
 }
diff --git a/sound/usb/validate.c b/sound/usb/validate.c
index 36ae78c3da3d..4034c2072415 100644
--- a/sound/usb/validate.c
+++ b/sound/usb/validate.c
@@ -233,7 +233,7 @@ static bool validate_midi_out_jack(const void *p,
 #define FIXED(p, t, s) { .protocol = (p), .type = (t), .size = sizeof(s) }
 #define FUNC(p, t, f) { .protocol = (p), .type = (t), .func = (f) }
 
-static struct usb_desc_validator audio_validators[] = {
+static const struct usb_desc_validator audio_validators[] = {
 	/* UAC1 */
 	FUNC(UAC_VERSION_1, UAC_HEADER, validate_uac1_header),
 	FIXED(UAC_VERSION_1, UAC_INPUT_TERMINAL,
@@ -288,7 +288,7 @@ static struct usb_desc_validator audio_validators[] = {
 	{ } /* terminator */
 };
 
-static struct usb_desc_validator midi_validators[] = {
+static const struct usb_desc_validator midi_validators[] = {
 	FIXED(UAC_VERSION_ALL, USB_MS_HEADER,
 	      struct usb_ms_header_descriptor),
 	FIXED(UAC_VERSION_ALL, USB_MS_MIDI_IN_JACK,