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ALSA: PCM: Allow resume only for suspended streams

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snd_pcm_resume() should bail out if the stream isn't in a suspended
state.  Otherwise it'd allow doubly resume.

Link: https://patch.msgid.link/20240624125443.27808-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2024-06-24 14:54:34 +02:00
parent c5ab94ea28
commit 1225675ca7
1 changed files with 2 additions and 0 deletions
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2
sound/core/pcm_native.c
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@ -1775,6 +1775,8 @@ static int snd_pcm_pre_resume(struct snd_pcm_substream *substream,
snd_pcm_state_t state)
{
struct snd_pcm_runtime *runtime = substream->runtime;
if (runtime->state != SNDRV_PCM_STATE_SUSPENDED)
return -EBADFD;
if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
return -ENOSYS;
runtime->trigger_master = substream;