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: 76fdb3a9e13a ('ALSA: fireface: add support for Fireface 400') Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/fireface/ff-protocol-ff400.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/firewire/fireface/ff-protocol-ff400.c b/sound/firewire/fireface/ff-protocol-ff400.c index 8f34174ee813..fd257051d4a4 100644 --- a/sound/firewire/fireface/ff-protocol-ff400.c +++ b/sound/firewire/fireface/ff-protocol-ff400.c @@ -86,7 +86,7 @@ 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