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ALSA: fireface: fix for state to fetch PCM frames

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commit 3d16200a3e upstream.

According to my memo at hand and saved records, writing 0x00000001 to
SND_FF_REG_FETCH_PCM_FRAMES disables fetching PCM frames in corresponding
channel, however current implement uses reversed logic. This results in
muted volume in device side during playback.

This commit corrects the bug.

Cc: <stable@vger.kernel.org> # v4.12+
Fixes: 76fdb3a9e1 ('ALSA: fireface: add support for Fireface 400')
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Sakamoto 2018-12-15 19:06:48 +09:00 committed by Greg Kroah-Hartman
parent 91056ae41b
commit 47cafb1329
1 changed files with 1 additions and 1 deletions
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2
sound/firewire/fireface/ff-protocol-ff400.c
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@ -152,7 +152,7 @@ static int ff400_switch_fetching_mode(struct snd_ff *ff, bool enable)
if (reg == NULL)
return -ENOMEM;
if (enable) {
if (!enable) {
/*
* Each quadlet is corresponding to data channels in a data
* blocks in reverse order. Precisely, quadlets for available