[ALSA] hda-codec - Don't query widget parameter for invalid NID

Don't query a widget parameter for an invalid NID in get_wcaps() but
rather returns zero (i.e. no attribute).
The read to an non-existing widget may result in a fatal codec
communication error.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
index ddc61a1..448c4ce 100644 (file)
--- a/sound/pci/hda/hda_local.h
+++ b/sound/pci/hda/hda_local.h
@@ -370,7 +370,7 @@ static inline u32 get_wcaps(struct hda_codec *codec, hda_nid_t nid)
 {
        if (nid < codec->start_nid ||
            nid >= codec->start_nid + codec->num_nodes)
-               return snd_hda_param_read(codec, nid, AC_PAR_AUDIO_WIDGET_CAP);
+               return 0;
        return codec->wcaps[nid - codec->start_nid];
 }