Patch "ALSA: vx: Don't try to update capture stream before running" has been added to the 3.18-stable tree

Patch "ALSA: vx: Don't try to update capture stream before running" has been added to the 3.18-stable tree

[gregkh]

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@vger.kernel.org> know about it.


>From foo@baz Sun Nov 19 12:16:40 CET 2017
From: Takashi Iwai <tiwai@suse.de>
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@suse.de>


[ 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@suse.de>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 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@suse.de 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