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ALSA: hda - Don't check capture source mixer if no ADC is available 

With multiple codec configurations, some codec might have no ADC, thus
it keeps spec->adc_nids = NULL.  This causes an Oops in alc_build_controls().

Reference: kernel bug #16156
	https://bugzilla.kernel.org/show_bug.cgi?id=16156

Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2010-06-11 11:24:58 +02:00
parent ab669967d0
commit fbe618f216
1 changed files with 12 additions and 10 deletions
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2
sound/pci/hda/patch_realtek.c
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@ -2619,6 +2619,7 @@ static int alc_build_controls(struct hda_codec *codec)
}
/* assign Capture Source enums to NID */
if (spec->capsrc_nids || spec->adc_nids) {
kctl = snd_hda_find_mixer_ctl(codec, "Capture Source");
if (!kctl)
kctl = snd_hda_find_mixer_ctl(codec, "Input Source");
@ -2630,6 +2631,7 @@ static int alc_build_controls(struct hda_codec *codec)
if (err < 0)
return err;
}
}
if (spec->cap_mixer) {
const char *kname = kctl ? kctl->id.name : NULL;
for (knew = spec->cap_mixer; knew->name; knew++) {