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 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
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-4.9 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 11:32:28 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-4.9/alsa-vx-don-t-try-to-update-capture-stream-before-running.patch queue-4.9/alsa-vx-fix-possible-transfer-overflow.patch queue-4.9/alsa-hda-realtek-add-new-codec-id-alc299.patch