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authorTakashi Iwai <tiwai@suse.de>2015-02-20 12:50:46 +0100
committerTakashi Iwai <tiwai@suse.de>2015-02-26 15:52:45 +0100
commit820cc6cf2c552155ea919e596a85e1f4e5dfa2b5 (patch)
treee6b75fc3f36ef14fd64d6f311c2f8e8c5391c8c5 /sound/pci
parentALSA: hda - Remove channel mode helper functions (diff)
downloadlinux-820cc6cf2c552155ea919e596a85e1f4e5dfa2b5.tar.xz
linux-820cc6cf2c552155ea919e596a85e1f4e5dfa2b5.zip
ALSA: hda - Clear pcm pointer assigned to hda_pcm at device removal
We leave the pcm field of struct hda_pcm at removal of each device, so far. This hasn't been a problem since unbinding the codec driver isn't supposed to happen and another route via snd_hda_codec_reset() clears all the once. However, for a proper unbind implementation, we need to care about it. This patch does the thing above properly: - Include struct hda_pcm pointer instead of struct hda_pcm_stream pointers in struct azx_dev. This allows us to point the hda_pcm object at dev_free callback. - Introduce to_hda_pcm_stream() macro for better readability. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/hda/hda_controller.c22
-rw-r--r--sound/pci/hda/hda_controller.h2
2 files changed, 16 insertions, 8 deletions
diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 789ca66c3094..1695f0e2bd9d 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -258,11 +258,18 @@ static void azx_timecounter_init(struct snd_pcm_substream *substream,
tc->cycle_last = last;
}
+static inline struct hda_pcm_stream *
+to_hda_pcm_stream(struct snd_pcm_substream *substream)
+{
+ struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
+ return &apcm->info->stream[substream->stream];
+}
+
static u64 azx_adjust_codec_delay(struct snd_pcm_substream *substream,
u64 nsec)
{
struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
- struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream];
+ struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
u64 codec_frames, codec_nsecs;
if (!hinfo->ops.get_delay)
@@ -398,7 +405,7 @@ static int azx_setup_periods(struct azx *chip,
static int azx_pcm_close(struct snd_pcm_substream *substream)
{
struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
- struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream];
+ struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
struct azx *chip = apcm->chip;
struct azx_dev *azx_dev = get_azx_dev(substream);
unsigned long flags;
@@ -440,7 +447,7 @@ static int azx_pcm_hw_free(struct snd_pcm_substream *substream)
struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
struct azx_dev *azx_dev = get_azx_dev(substream);
struct azx *chip = apcm->chip;
- struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream];
+ struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
int err;
/* reset BDL address */
@@ -467,7 +474,7 @@ static int azx_pcm_prepare(struct snd_pcm_substream *substream)
struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
struct azx *chip = apcm->chip;
struct azx_dev *azx_dev = get_azx_dev(substream);
- struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream];
+ struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned int bufsize, period_bytes, format_val, stream_tag;
int err;
@@ -707,7 +714,7 @@ unsigned int azx_get_position(struct azx *chip,
if (substream->runtime) {
struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
- struct hda_pcm_stream *hinfo = apcm->hinfo[stream];
+ struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
if (chip->get_delay[stream])
delay += chip->get_delay[stream](chip, azx_dev, pos);
@@ -790,7 +797,7 @@ static struct snd_pcm_hardware azx_pcm_hw = {
static int azx_pcm_open(struct snd_pcm_substream *substream)
{
struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
- struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream];
+ struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
struct azx *chip = apcm->chip;
struct azx_dev *azx_dev;
struct snd_pcm_runtime *runtime = substream->runtime;
@@ -904,6 +911,7 @@ static void azx_pcm_free(struct snd_pcm *pcm)
struct azx_pcm *apcm = pcm->private_data;
if (apcm) {
list_del(&apcm->list);
+ apcm->info->pcm = NULL;
kfree(apcm);
}
}
@@ -940,6 +948,7 @@ static int azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec,
apcm->chip = chip;
apcm->pcm = pcm;
apcm->codec = codec;
+ apcm->info = cpcm;
pcm->private_data = apcm;
pcm->private_free = azx_pcm_free;
if (cpcm->pcm_type == HDA_PCM_TYPE_MODEM)
@@ -947,7 +956,6 @@ static int azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec,
list_add_tail(&apcm->list, &chip->pcm_list);
cpcm->pcm = pcm;
for (s = 0; s < 2; s++) {
- apcm->hinfo[s] = &cpcm->stream[s];
if (cpcm->stream[s].substreams)
snd_pcm_set_ops(pcm, s, &azx_pcm_ops);
}
diff --git a/sound/pci/hda/hda_controller.h b/sound/pci/hda/hda_controller.h
index e4f46a21698a..94c1a4719f7f 100644
--- a/sound/pci/hda/hda_controller.h
+++ b/sound/pci/hda/hda_controller.h
@@ -283,7 +283,7 @@ struct azx_pcm {
struct azx *chip;
struct snd_pcm *pcm;
struct hda_codec *codec;
- struct hda_pcm_stream *hinfo[2];
+ struct hda_pcm *info;
struct list_head list;
};