ALSA: bebob: fix wrong decoding of clock information for Terratec PHASE 88 Rack FW

Terratec PHASE 88 rack fw has two registers for source of clock, one is
for internal/external, and another is for wordclock/spdif for external.

When clock source is internal, information in another register has no meaning.
Thus it must be ignored, but current implementation decodes it. This causes
over-indexing reference to labels.

Reported-by: András Murányi <muranyia@gmail.com>
Tested-by: András Murányi <muranyia@gmail.com>
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/firewire/bebob/bebob_terratec.c b/sound/firewire/bebob/bebob_terratec.c
index 0e4c0bf..9940611 100644 (file)
--- a/sound/firewire/bebob/bebob_terratec.c
+++ b/sound/firewire/bebob/bebob_terratec.c
@@ -24,7 +24,12 @@ phase88_rack_clk_src_get(struct snd_bebob *bebob, unsigned int *id)
        if (err < 0)
                goto end;
 
-       *id = (enable_ext & 0x01) | ((enable_word & 0x01) << 1);
+       if (enable_ext == 0)
+               *id = 0;
+       else if (enable_word == 0)
+               *id = 1;
+       else
+               *id = 2;
 end:
        return err;
 }