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 1146727..69f2525 100644 (file)
--- 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);