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authorTakashi Iwai <tiwai@suse.de>2021-02-06 21:36:53 +0100
committerTakashi Iwai <tiwai@suse.de>2021-02-08 16:00:28 +0100
commit29bb274e94974669acb5186a75538f20df1508b6 (patch)
treec7a38182f4688ff066763c2b545882d8dac43069 /sound/core/pcm.c
parent257d2d7e9e798305d65825cb82b0a7d1c0511e89 (diff)
ALSA: pcm: Call sync_stop at disconnection
The PCM core should perform the sync for the pending stop operations at disconnection. Otherwise it may lead to unexpected access. Currently the old user of sync_stop, USB-audio driver, has its own sync, so this isn't needed, but it's better to guarantee the sync in the PCM core level. This patch adds the missing sync_stop call at PCM disconnection callback. It also assures the IRQ sync if it's specified in the card. snd_pcm_sync_stop() is slightly modified to be called also for any PCM substream object now. Fixes: 1e850beea278 ("ALSA: pcm: Add the support for sync-stop operation") Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20210206203656.15959-2-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm.c')
-rw-r--r--sound/core/pcm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index e5947281e5fc..50eb29fcdfe7 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -1111,6 +1111,10 @@ static int snd_pcm_dev_disconnect(struct snd_device *device)
}
}
+ for (cidx = 0; cidx < 2; cidx++)
+ for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
+ snd_pcm_sync_stop(substream, false);
+
pcm_call_notify(pcm, n_disconnect);
for (cidx = 0; cidx < 2; cidx++) {
snd_unregister_device(&pcm->streams[cidx].dev);