From: Takashi Iwai Date: Sun, 23 May 2021 09:09:20 +0000 (+0200) Subject: ALSA: pcm: Block the release until the system resume finishes X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=534a427bface78d682482ad66ce1a517522acc1d;p=linux.git ALSA: pcm: Block the release until the system resume finishes The normal PCM operations are already blocked during the card power off state in the PCM common ioctl handler, but the release isn't covered. As the PCM stream release may also access the hardware, let's block the release until the card power turns on. Reviewed-by: Jaroslav Kysela Link: https://lore.kernel.org/r/20210523090920.15345-7-tiwai@suse.de Signed-off-by: Takashi Iwai --- diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 82f80d0c068b9..11acea02bc74b 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -2799,6 +2799,10 @@ static int snd_pcm_release(struct inode *inode, struct file *file) if (snd_BUG_ON(!substream)) return -ENXIO; pcm = substream->pcm; + + /* block until the device gets woken up as it may touch the hardware */ + snd_power_wait(pcm->card); + mutex_lock(&pcm->open_mutex); snd_pcm_release_substream(substream); kfree(pcm_file);