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authorTakashi Iwai <tiwai@suse.de>2020-11-23 09:53:36 +0100
committerTakashi Iwai <tiwai@suse.de>2020-11-23 15:16:04 +0100
commit6aa719d15a1903eb3fd0e052ae53f3b024ad4d05 (patch)
tree026ff7427535388baf0850e848991c535c3bb0a1 /sound/usb/pcm.c
parentALSA: usb-audio: Refactoring endpoint URB deactivation (diff)
downloadlinux-6aa719d15a1903eb3fd0e052ae53f3b024ad4d05.tar.xz
linux-6aa719d15a1903eb3fd0e052ae53f3b024ad4d05.zip
ALSA: usb-audio: Drop unneeded snd_usb_substream fields
Some fields like interface and alt_idx in snd_usb_substream are mostly useless now as they can be referred via either cur_audiofmt or data_endpoint assigned to the substream. Drop those, and also assure the concurrency about the access of cur_audiofmt field. Tested-by: Keith Milner <kamilner@superlative.org> Tested-by: Dylan Robinson <dylan_robinson@motu.com> Link: https://lore.kernel.org/r/20201123085347.19667-31-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/pcm.c')
-rw-r--r--sound/usb/pcm.c24
1 files changed, 6 insertions, 18 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index fc028492dd1a..95a6a854dc55 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -797,20 +797,11 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
subs->sync_endpoint);
}
- subs->interface = fmt->iface;
- subs->altset_idx = fmt->altset_idx;
+ mutex_lock(&chip->mutex);
subs->cur_audiofmt = fmt;
+ mutex_unlock(&chip->mutex);
ret = configure_endpoints(chip, subs);
- if (ret < 0)
- goto unlock;
-
- subs->pcm_format = params_format(hw_params);
- subs->period_bytes = params_period_bytes(hw_params);
- subs->period_frames = params_period_size(hw_params);
- subs->buffer_periods = params_periods(hw_params);
- subs->channels = params_channels(hw_params);
- subs->cur_rate = params_rate(hw_params);
unlock:
if (ret < 0)
@@ -835,9 +826,9 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
struct snd_usb_audio *chip = subs->stream->chip;
snd_media_stop_pipeline(subs);
+ mutex_lock(&chip->mutex);
subs->cur_audiofmt = NULL;
- subs->cur_rate = 0;
- subs->period_bytes = 0;
+ mutex_unlock(&chip->mutex);
if (!snd_usb_lock_shutdown(chip)) {
if (stop_endpoints(subs))
sync_pending_stops(subs);
@@ -1274,8 +1265,6 @@ static int snd_usb_pcm_open(struct snd_pcm_substream *substream)
struct snd_usb_substream *subs = &as->substream[direction];
int ret;
- subs->interface = -1;
- subs->altset_idx = 0;
runtime->hw = snd_usb_hardware;
runtime->private_data = subs;
subs->pcm_substream = substream;
@@ -1308,7 +1297,6 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream)
snd_media_stop_pipeline(subs);
if (!snd_usb_lock_shutdown(subs->stream->chip)) {
- subs->interface = -1;
ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D1);
snd_usb_unlock_shutdown(subs->stream->chip);
if (ret < 0)
@@ -1570,10 +1558,10 @@ static void prepare_playback_urb(struct snd_usb_substream *subs,
}
bytes = frames * ep->stride;
- if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE &&
+ if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U16_LE &&
subs->cur_audiofmt->dsd_dop)) {
fill_playback_urb_dsd_dop(subs, urb, bytes);
- } else if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U8 &&
+ } else if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U8 &&
subs->cur_audiofmt->dsd_bitrev)) {
/* bit-reverse the bytes */
u8 *buf = urb->transfer_buffer;