ALSA: hda - Fix Oops due to STAC/IDT auto-mic changes

The previous auto-mic patch for STAC/IDT codecs causes the Oops on
machines without digital mic pins.  This patch fixes the problem.

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

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 163aad599b6a41a864f565e08f290b8bbc021cb2..2760730605762320dc11f4e21500d73dbebed6e8 100644 (file)
--- 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);