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ALSA: hda - Fix Oops at codec reset/reconfig 

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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-09-10 09:39:31 +02:00
parent 1213a205f9
commit 07dc59f098
1 changed files with 1 additions and 1 deletions
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2
sound/pci/hda/hda_codec.c
View File

@ -2353,6 +2353,7 @@ int snd_hda_codec_reset(struct hda_codec *codec)
}
if (codec->patch_ops.free)
codec->patch_ops.free(codec);
memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));
snd_hda_jack_tbl_clear(codec);
codec->proc_widget_hook = NULL;
codec->spec = NULL;
@ -2368,7 +2369,6 @@ int snd_hda_codec_reset(struct hda_codec *codec)
codec->num_pcms = 0;
codec->pcm_info = NULL;
codec->preset = NULL;
memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));
codec->slave_dig_outs = NULL;
codec->spdif_status_reset = 0;
module_put(codec->owner);