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    Subject[PATCH 3.18 19/38] ALSA: vx: Dont try to update capture stream before running
    Date
    3.18-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    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);

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