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| author | Takashi Iwai <tiwai@suse.de> | 2015-02-27 19:43:19 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-03-03 13:26:24 +0300 |
| commit | bbbc7e8502c95237dbd86cc4d0a12ca9a6b18c8f (patch) | |
| tree | 71d5973b321c194ca5b9fd76592844eb37c4c9ed /sound/pci/hda/patch_via.c | |
| parent | f4de8fe6cffb449a779dff61f071bd1af9e18e0f (diff) | |
| download | linux-bbbc7e8502c95237dbd86cc4d0a12ca9a6b18c8f.tar.xz | |
ALSA: hda - Allocate hda_pcm objects dynamically
So far, the hda_codec object kept the hda_pcm list in an array, and
the codec driver was expected to assign the array. However, this
makes the object life cycle management harder, because the assigned
array is freed at the codec driver detach while it might be still
accessed by the opened streams.
In this patch, we allocate each hda_pcm object dynamically and manage
it as a linked list. Each object has a kref refcount, and both the
codec driver binder and the PCM open/close touches it, so that the
object won't be freed while in use.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/patch_via.c')
| -rw-r--r-- | sound/pci/hda/patch_via.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c index 57ad503ff940..11a05638e03b 100644 --- a/sound/pci/hda/patch_via.c +++ b/sound/pci/hda/patch_via.c @@ -683,8 +683,10 @@ static int vt1708_build_pcms(struct hda_codec *codec) * 24bit samples are used. Until any workaround is found, * disable the 24bit format, so far. */ - for (i = 0; i < codec->num_pcms; i++) { - struct hda_pcm *info = &spec->gen.pcm_rec[i]; + for (i = 0; i < ARRAY_SIZE(spec->gen.pcm_rec); i++) { + struct hda_pcm *info = spec->gen.pcm_rec[i]; + if (!info) + continue; if (!info->stream[SNDRV_PCM_STREAM_PLAYBACK].substreams || info->pcm_type != HDA_PCM_TYPE_AUDIO) continue; |