From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 4 Jan 2017 11:34:14 +0000 (+0100)
Subject: ALSA: vx: Don't try to update capture stream before running
X-Git-Tag: v3.18.83~20
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ad550021c29227e60d8433fde31493bba100b3b1;p=thirdparty%2Fkernel%2Fstable.git

ALSA: vx: Don't try to update capture stream before running


[ 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>
---

diff --git a/sound/drivers/vx/vx_pcm.c b/sound/drivers/vx/vx_pcm.c
index 11467272089e4..69f2525857804 100644
--- 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 vx_core *chip, struct snd_pcm_substream
 	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);