ALSA: hda - Fix Oops at codec reset/reconfig
authorTakashi Iwai <tiwai@suse.de>
Mon, 10 Sep 2012 07:39:31 +0000 (09:39 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 2 Oct 2012 17:29:52 +0000 (10:29 -0700)
commit6172ace501d10b1c629c5e82af26d0b87773c1ef
tree68b4b4f08d6058aebe094dd37318e94e56e647a8
parent68983b9dae341fbca6b74be02248adb86e105818
ALSA: hda - Fix Oops at codec reset/reconfig

commit 07dc59f0988cb54fd87bd373b3b27eb2401dd811 upstream.

snd_hda_codec_reset() calls restore_pincfgs() where the codec is
powered up again, which eventually tries to resume and initialize via
the callbacks of the codec.  However, it's the place just after codec
free callback, thus no codec callbacks should be called after that.
On a codec like CS4206, it results in Oops due to the access in init
callback.

This patch fixes the issue by clearing the codec callbacks properly
after freeing codec.

Reported-by: Daniel J Blueman <daniel@quora.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sound/pci/hda/hda_codec.c