From: Pardha Saradhi K <pardha.saradhi.kesapragada@xxxxxxxxx> Check if the DMA Channel is already stopped. There is no need to stop it again if stopped. Signed-off-by: Pardha Saradhi K <pardha.saradhi.kesapragada@xxxxxxxxx> Signed-off-by: Sriram Periyasamy <sriramx.periyasamy@xxxxxxxxx> --- sound/hda/hdac_stream.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c index aa8a2884289f..c1810eb7212b 100644 --- a/sound/hda/hdac_stream.c +++ b/sound/hda/hdac_stream.c @@ -89,6 +89,11 @@ void snd_hdac_stream_clear(struct hdac_stream *azx_dev) int timeout = 300; unsigned char val; + /* check if the DMA is already stopped */ + val = snd_hdac_stream_readb(azx_dev, SD_CTL) & SD_CTL_DMA_START; + if (!val) + return; + snd_hdac_stream_updateb(azx_dev, SD_CTL, SD_CTL_DMA_START | SD_INT_MASK, 0); -- 2.7.4 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
