[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>

1 files changed, 3 insertions, 2 deletions

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index 97e9af130b71..1589d2f2917f 100644
--- 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";