ALSA: hda/realtek - Skip invalid digital out pins

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

Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 9543bc8aaef6a63f7dacdc7db5b0e467ff7c5fff..80d6add8a620e23fba3c7790b949eeb202d1a8b8 100644 (file)
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -1604,27 +1604,29 @@ 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++) {
                hda_nid_t conn[4];
                err = snd_hda_get_connections(codec,
                                              spec->autocfg.dig_out_pins[i],
                                              conn, ARRAY_SIZE(conn));
-               if (err < 0)
+               if (err <= 0)
                        continue;
                dig_nid = conn[0]; /* assume the first element is audio-out */
-               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) {