ALSA: oxygen, virtuoso: fix exchanged L/R volumes of aux and CD inputs

The driver accidentally exchanged the left/right fields for stereo AC'97
mixer registers.  This affected only the aux and CD inputs because the
line input bypasses the AC'97 codec and the mic input is mono; cards
without AC'97 (Xonar DS/DG/HDAV Slim, HG2PCI, HiFier) were not affected.

Reported-and-tested-by: Abby Cedar <abbycedar@yahoo.com.au>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: 2.6.31+ <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/oxygen/oxygen_mixer.c b/sound/pci/oxygen/oxygen_mixer.c
index 26c7e8bcb229361b03397e52a59c37eb183ed18d..c0dbb52d45be5306799fb144e63e60d81348045e 100644 (file)
--- a/sound/pci/oxygen/oxygen_mixer.c
+++ b/sound/pci/oxygen/oxygen_mixer.c
@@ -618,9 +618,12 @@ static int ac97_volume_get(struct snd_kcontrol *ctl,
        mutex_lock(&chip->mutex);
        reg = oxygen_read_ac97(chip, codec, index);
        mutex_unlock(&chip->mutex);
-       value->value.integer.value[0] = 31 - (reg & 0x1f);
-       if (stereo)
-               value->value.integer.value[1] = 31 - ((reg >> 8) & 0x1f);
+       if (!stereo) {
+               value->value.integer.value[0] = 31 - (reg & 0x1f);
+       } else {
+               value->value.integer.value[0] = 31 - ((reg >> 8) & 0x1f);
+               value->value.integer.value[1] = 31 - (reg & 0x1f);
+       }
        return 0;
 }
 
@@ -636,14 +639,14 @@ static int ac97_volume_put(struct snd_kcontrol *ctl,
 
        mutex_lock(&chip->mutex);
        oldreg = oxygen_read_ac97(chip, codec, index);
-       newreg = oldreg;
-       newreg = (newreg & ~0x1f) |
-               (31 - (value->value.integer.value[0] & 0x1f));
-       if (stereo)
-               newreg = (newreg & ~0x1f00) |
-                       ((31 - (value->value.integer.value[1] & 0x1f)) << 8);
-       else
-               newreg = (newreg & ~0x1f00) | ((newreg & 0x1f) << 8);
+       if (!stereo) {
+               newreg = oldreg & ~0x1f;
+               newreg |= 31 - (value->value.integer.value[0] & 0x1f);
+       } else {
+               newreg = oldreg & ~0x1f1f;
+               newreg |= (31 - (value->value.integer.value[0] & 0x1f)) << 8;
+               newreg |= 31 - (value->value.integer.value[1] & 0x1f);
+       }
        change = newreg != oldreg;
        if (change)
                oxygen_write_ac97(chip, codec, index, newreg);