1 files changed, 3 insertions, 2 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 163aad599b6a..276073060576 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -3671,7 +3671,7 @@ static int set_mic_route(struct hda_codec *codec,
                 if (i < 0)
                         return -1;
                 mic->mux_idx = i;
-        }  else {
+        }  else if (spec->dmux_nids) {
                 /* digital pin */
                 mic->mux_idx = 0;
                 i = get_connection_index(codec, spec->dmux_nids[0], pin);
@@ -4373,7 +4373,8 @@ static int stac92xx_init(struct hda_codec *codec)
         }
         if (spec->auto_mic) {
                 /* initialize connection to analog input */
-                snd_hda_codec_write_cache(codec, spec->dmux_nids[0], 0,
+                if (spec->dmux_nids)
+                        snd_hda_codec_write_cache(codec, spec->dmux_nids[0], 0,
                                           AC_VERB_SET_CONNECT_SEL, 0);
                 if (enable_pin_detect(codec, spec->ext_mic.pin, STAC_MIC_EVENT))
                         stac_issue_unsol_event(codec, spec->ext_mic.pin);