ALSA: hda - Don't query connections for widgets have no connections

Fixes the kernel warnings with IDT codecs like
    hda_codec: connection list not available for 0x1e

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

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 05fcd60cc46f..a2f57e3581e0 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -3408,6 +3408,9 @@ static int get_connection_index(struct hda_codec *codec, hda_nid_t mux,
         hda_nid_t conn[HDA_MAX_NUM_INPUTS];
         int i, nums;
 
+        if (!(get_wcaps(codec, mux) & AC_WCAP_CONN_LIST))
+                return -1;
+
         nums = snd_hda_get_connections(codec, mux, conn, ARRAY_SIZE(conn));
         for (i = 0; i < nums; i++)
                 if (conn[i] == nid)