ALSA: hda - Fix unsigned comparison in patch_sigmatel.c

Fix the comparison of unsigned int that causes a compile warning below
by changing to the right signed type:
  patch_sigmatel.c: In function ‘stac92xx_vref_set’:
  patch_sigmatel.c:658: warning: comparison of unsigned expression < 0 is always false

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 93e47c96a38b..090957735e05 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -639,7 +639,7 @@ static int stac92xx_smux_enum_put(struct snd_kcontrol *kcontrol,
 static unsigned int stac92xx_vref_set(struct hda_codec *codec,
                                         hda_nid_t nid, unsigned int new_vref)
 {
-        unsigned int error;
+        int error;
         unsigned int pincfg;
         pincfg = snd_hda_codec_read(codec, nid, 0,
                                 AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
@@ -2703,7 +2703,7 @@ static int stac92xx_dc_bias_put(struct snd_kcontrol *kcontrol,
 {
         struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
         unsigned int new_vref = 0;
-        unsigned int error;
+        int error;
         hda_nid_t nid = kcontrol->private_value;
 
         if (ucontrol->value.enumerated.item[0] == 0)