ALSA: hda - Fix empty DAC filling in patch_via.c

In via_auto_fill_adc_nids(), the parser tries to fill dac_nids[] at
the point of the current line-out (i).  When no valid path is found
for this output, this results in dac = 0, thus it creates a hole in
dac_nids[].  This confuses is_empty_dac() and trims the detected DAC
in later reference.

This patch fixes the bug by appending DAC properly to dac_nids[] in
via_auto_fill_adc_nids().

Reported-by: Massimo Del Fedele <max@veneto.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c
index 72a2f60b087c8ba066b52e5aaf4cda500227471f..bf57fa6a4add9b20c516c245c06b58bfbc438131 100644 (file)
--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -1809,11 +1809,11 @@ static int via_auto_fill_dac_nids(struct hda_codec *codec)
 {
        struct via_spec *spec = codec->spec;
        const struct auto_pin_cfg *cfg = &spec->autocfg;
-       int i, dac_num;
+       int i;
        hda_nid_t nid;
 
+       spec->multiout.num_dacs = 0;
        spec->multiout.dac_nids = spec->private_dac_nids;
-       dac_num = 0;
        for (i = 0; i < cfg->line_outs; i++) {
                hda_nid_t dac = 0;
                nid = cfg->line_out_pins[i];
@@ -1824,16 +1824,13 @@ static int via_auto_fill_dac_nids(struct hda_codec *codec)
                if (!i && parse_output_path(codec, nid, dac, 1,
                                            &spec->out_mix_path))
                        dac = spec->out_mix_path.path[0];
-               if (dac) {
-                       spec->private_dac_nids[i] = dac;
-                       dac_num++;
-               }
+               if (dac)
+                       spec->private_dac_nids[spec->multiout.num_dacs++] = dac;
        }
        if (!spec->out_path[0].depth && spec->out_mix_path.depth) {
                spec->out_path[0] = spec->out_mix_path;
                spec->out_mix_path.depth = 0;
        }
-       spec->multiout.num_dacs = dac_num;
        return 0;
 }