ALSA: hda - Terminate the recursive connection search properly

The recursive search of widget connections in snd_hda_get_conn_index()
must be terminated at the pin and the audio-out widgets.  Otherwise
you'll get "too deep connection" warnings unnecessarily.

Reported-by: Francis Moreau <francis.moro@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 5 insertions, 1 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 3e7850c238c3..f3aefef37216 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -579,9 +579,13 @@ int snd_hda_get_conn_index(struct hda_codec *codec, hda_nid_t mux,
                 return -1;
         }
         recursive++;
-        for (i = 0; i < nums; i++)
+        for (i = 0; i < nums; i++) {
+                unsigned int type = get_wcaps_type(get_wcaps(codec, conn[i]));
+                if (type == AC_WID_PIN || type == AC_WID_AUD_OUT)
+                        continue;
                 if (snd_hda_get_conn_index(codec, conn[i], nid, recursive) >= 0)
                         return i;
+        }
         return -1;
 }
 EXPORT_SYMBOL_HDA(snd_hda_get_conn_index);