This is a note to let you know that I've just added the patch titled
ALSA: hiface: Fix M2Tech hiFace driver sampling rate change
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-hiface-fix-m2tech-hiface-driver-sampling-rate-change.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 995c6a7fd9b9212abdf01160f6ce3193176be503 Mon Sep 17 00:00:00 2001
From: Jussi Laako <jussi@xxxxxxxxxxxxx>
Date: Mon, 28 Nov 2016 11:27:45 +0200
Subject: ALSA: hiface: Fix M2Tech hiFace driver sampling rate change
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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
Patches currently in stable-queue which might be from jussi@xxxxxxxxxxxxx are
queue-4.4/alsa-hiface-fix-m2tech-hiface-driver-sampling-rate-change.patch
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