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>

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 05fcd60cc46f79f0d5442f1297639fdf4d3ec79b..a2f57e3581e0918ceac5682afdbf65575b28beab 100644 (file)
--- 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)