ALSA: hda/realtek - Skip invalid digital out pins

commit 51e4152a969aa6d2306492ebf143932dcb535c9b upstream.

Some BIOS report invalid pins as digital output pins.  The driver checks
the connection but it doesn't do it fully correctly, and it leaves some
undefined value as the audio-out widget, which makes the driver spewing
warnings.  This patch fixes the issue.

Reference: https://bugzilla.novell.com/show_bug.cgi?id=727348

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 7 insertions, 5 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 62b13141876..e7dc0340da6 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -2088,25 +2088,27 @@ static void alc_auto_init_digital(struct hda_codec *codec)
 static void alc_auto_parse_digital(struct hda_codec *codec)
 {
         struct alc_spec *spec = codec->spec;
-        int i, err;
+        int i, err, nums;
         hda_nid_t dig_nid;
 
         /* support multiple SPDIFs; the secondary is set up as a slave */
+        nums = 0;
         for (i = 0; i < spec->autocfg.dig_outs; i++) {
                 err = snd_hda_get_connections(codec,
                                               spec->autocfg.dig_out_pins[i],
                                               &dig_nid, 1);
-                if (err < 0)
+                if (err <= 0)
                         continue;
-                if (!i) {
+                if (!nums) {
                         spec->multiout.dig_out_nid = dig_nid;
                         spec->dig_out_type = spec->autocfg.dig_out_type[0];
                 } else {
                         spec->multiout.slave_dig_outs = spec->slave_dig_outs;
-                        if (i >= ARRAY_SIZE(spec->slave_dig_outs) - 1)
+                        if (nums >= ARRAY_SIZE(spec->slave_dig_outs) - 1)
                                 break;
-                        spec->slave_dig_outs[i - 1] = dig_nid;
+                        spec->slave_dig_outs[nums - 1] = dig_nid;
                 }
+                nums++;
         }
 
         if (spec->autocfg.dig_in_pin) {