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| author | Ranjani Sridharan <ranjani.sridharan@linux.intel.com> | 2019-02-08 17:29:53 -0600 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-02-11 17:04:25 +0100 |
| commit | d9c0b2afe820fa3b3f8258a659daee2cc71ca3ef (patch) | |
| tree | 165d2ab2cff3c31d3a3c91ea2a9c960810c2a185 | |
| parent | bb580602f3924976d8bc36c171266de73e92cbf7 (diff) | |
| download | linux-d9c0b2afe820fa3b3f8258a659daee2cc71ca3ef.tar.gz linux-d9c0b2afe820fa3b3f8258a659daee2cc71ca3ef.tar.bz2 linux-d9c0b2afe820fa3b3f8258a659daee2cc71ca3ef.zip | |
ALSA: PCM: check if ops are defined before suspending PCM
BE dai links only have internal PCM's and their substream ops may
not be set. Suspending these PCM's will result in their
ops->trigger() being invoked and cause a kernel oops.
So skip suspending PCM's if their ops are NULL.
[ NOTE: this change is required now for following the recent PCM core
change to get rid of snd_pcm_suspend() call. Since DPCM BE takes
the runtime carried from FE while keeping NULL ops, it can hit this
bug. See details at:
https://github.com/thesofproject/linux/pull/582
-- tiwai ]
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/core/pcm_native.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 672babd20cb1..f731f904e8cc 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -1520,6 +1520,14 @@ int snd_pcm_suspend_all(struct snd_pcm *pcm) /* FIXME: the open/close code should lock this as well */ if (substream->runtime == NULL) continue; + + /* + * Skip BE dai link PCM's that are internal and may + * not have their substream ops set. + */ + if (!substream->ops) + continue; + err = snd_pcm_suspend(substream); if (err < 0 && err != -EBUSY) return err; |