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ALSA: hda/jack - Fix NULL-dereference at probing 

At probing time, the elements that aren't assigned to kctl or jack may
be called.  Need proper NULL-checks.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2011-11-11 17:53:03 +01:00
parent d1cb620081
commit cfc7c9d307
1 changed files with 3 additions and 1 deletions
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4
sound/pci/hda/hda_jack.c
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@ -194,6 +194,8 @@ void snd_hda_jack_report_sync(struct hda_codec *codec)
for (i = 0; i < codec->jacktbl.used; i++, jack++)
if (jack->nid) {
jack_detect_update(codec, jack);
if (!jack->kctl)
continue;
state = get_jack_plug_state(jack->pin_sense);
snd_kctl_jack_report(codec->bus->card, jack->kctl, state);
}
@ -356,7 +358,7 @@ void snd_hda_input_jack_report(struct hda_codec *codec, hda_nid_t nid)
unsigned int present;
int type;
if (!jack)
if (!jack || !jack->jack)
return;
present = snd_hda_jack_detect(codec, nid);