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[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>
This commit is contained in:
Takashi Iwai 2008-01-22 15:37:13 +01:00 committed by Jaroslav Kysela
parent 0ef6ce7b6a
commit dca008f367
1 changed files with 1 additions and 1 deletions
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2
sound/pci/hda/hda_local.h
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@ -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];
}