[PATCH 3.18 19/38] ALSA: vx: Dont try to update capture stream before running

Greg Kroah-Hartman
2017-11-19T14:31:01Z

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);