3.16.42-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Jussi Laako <jussi@xxxxxxxxxxxxx> commit 995c6a7fd9b9212abdf01160f6ce3193176be503 upstream. Sampling rate changes after first set one are not reflected to the hardware, while driver and ALSA think the rate has been changed. Fix the problem by properly stopping the interface at the beginning of prepare call, allowing new rate to be set to the hardware. This keeps the hardware in sync with the driver. Signed-off-by: Jussi Laako <jussi@xxxxxxxxxxxxx> Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- sound/usb/hiface/pcm.c | 2 ++ 1 file changed, 2 insertions(+) --- a/sound/usb/hiface/pcm.c +++ b/sound/usb/hiface/pcm.c @@ -445,6 +445,8 @@ static int hiface_pcm_prepare(struct snd mutex_lock(&rt->stream_mutex); + hiface_pcm_stream_stop(rt); + sub->dma_off = 0; sub->period_off = 0;