This is a note to let you know that I've just added the patch titled
ALSA: vx: Don't try to update capture stream before running
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-vx-don-t-try-to-update-capture-stream-before-running.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sun Nov 19 12:16:40 CET 2017
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Wed, 4 Jan 2017 12:34:14 +0100
Subject: ALSA: vx: Don't try to update capture stream before running
From: Takashi Iwai <tiwai@xxxxxxx>
[ Upstream commit ed3c177d960bb5881b945ca6f784868126bb90db ]
The update of stream costs significantly, and we should avoid it
unless the stream really has started. Check pipe->running flag
instead of pipe->prepared.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/drivers/vx/vx_pcm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/sound/drivers/vx/vx_pcm.c
+++ b/sound/drivers/vx/vx_pcm.c
@@ -1015,7 +1015,7 @@ static void vx_pcm_capture_update(struct
int size, space, count;
struct snd_pcm_runtime *runtime = subs->runtime;
- if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE))
+ if (!pipe->running || (chip->chip_status & VX_STAT_IS_STALE))
return;
size = runtime->buffer_size - snd_pcm_capture_avail(runtime);
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-3.18/alsa-vx-don-t-try-to-update-capture-stream-before-running.patch
queue-3.18/alsa-vx-fix-possible-transfer-overflow.patch