[ALSA] hda-codec - Fix NULL dereference in generic hda code

Fix NULL dereference in hda_generic.c.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index 97e9af1..1589d2f 100644 (file)
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -485,8 +485,9 @@ static const char *get_input_type(struct hda_gnode *node, unsigned int *pinctl)
                        return "Front Aux";
                return "Aux";
        case AC_JACK_MIC_IN:
-               if (node->pin_caps &
-                   (AC_PINCAP_VREF_80 << AC_PINCAP_VREF_SHIFT))
+               if (pinctl &&
+                   (node->pin_caps &
+                    (AC_PINCAP_VREF_80 << AC_PINCAP_VREF_SHIFT)))
                        *pinctl |= AC_PINCTL_VREF_80;
                if ((location & 0x0f) == AC_JACK_LOC_FRONT)
                        return "Front Mic";