ALSA: mips: avoid potential uninitialized variable use

MIPS allmodconfig results in this warning:

sound/mips/hal2.c: In function 'hal2_gain_get':
sound/mips/hal2.c:224:35: error: 'r' may be used uninitialized in this function [-Werror=maybe-uninitialized]
sound/mips/hal2.c:223:35: error: 'l' may be used uninitialized in this function [-Werror=maybe-uninitialized]
sound/mips/hal2.c: In function 'hal2_gain_put':
sound/mips/hal2.c:260:13: error: 'new' may be used uninitialized in this function [-Werror=maybe-uninitialized]
sound/mips/hal2.c:260:13: error: 'old' may be used uninitialized in this function [-Werror=maybe-uninitialized]

Returning an error for all unexpected cases shuts up the warning

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/mips/hal2.c b/sound/mips/hal2.c
index ede449f..00fc924 100644 (file)
--- a/sound/mips/hal2.c
+++ b/sound/mips/hal2.c
@@ -219,6 +219,8 @@ static int hal2_gain_get(struct snd_kcontrol *kcontrol,
                l = (tmp >> H2I_C2_L_GAIN_SHIFT) & 15;
                r = (tmp >> H2I_C2_R_GAIN_SHIFT) & 15;
                break;
+       default:
+               return -EINVAL;
        }
        ucontrol->value.integer.value[0] = l;
        ucontrol->value.integer.value[1] = r;
@@ -256,6 +258,8 @@ static int hal2_gain_put(struct snd_kcontrol *kcontrol,
                new |= (r << H2I_C2_R_GAIN_SHIFT);
                hal2_i_write32(hal2, H2I_ADC_C2, new);
                break;
+       default:
+               return -EINVAL;
        }
        return old != new;
 }