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ALSA: jack: don't report input event for phantom jack

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There is no input_dev for phantom jack, we should not report
input event for it, otherwise, NULL pointer dereference error
will occur.

Fixes: 2ba2dfa1fc ('ALSA: hda - Update to use the new jack kctls method')
Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jie Yang 2015-04-30 20:22:46 +08:00 committed by Takashi Iwai
parent 12e180a27f
commit 6ed9495e22
1 changed files with 7 additions and 4 deletions
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11
sound/core/jack.c
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@ -339,6 +339,13 @@ void snd_jack_report(struct snd_jack *jack, int status)
if (!jack)
return;
list_for_each_entry(jack_kctl, &jack->kctl_list, list)
snd_kctl_jack_report(jack->card, jack_kctl->kctl,
status & jack_kctl->mask_bits);
if (!jack->input_dev)
return;
for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
int testbit = SND_JACK_BTN_0 >> i;
@ -357,10 +364,6 @@ void snd_jack_report(struct snd_jack *jack, int status)
input_sync(jack->input_dev);
list_for_each_entry(jack_kctl, &jack->kctl_list, list)
snd_kctl_jack_report(jack->card, jack_kctl->kctl,
status & jack_kctl->mask_bits);
}
EXPORT_SYMBOL(snd_jack_report);