If the codec->registered is not set then it means that pm_runtime is not yet enabled and the codec->pcm_list_head has not been initialized.

The access to the not initialized pcm_list_head will lead a kernel crash during shutdown.

Reported-by: Guennadi Liakhovetski guennadi.liakhovetski@linux.intel.com Signed-off-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com Tested-by: Guennadi Liakhovetski guennadi.liakhovetski@linux.intel.com --- sound/pci/hda/hda_codec.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 7016b48227bf..f552785d301e 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -3000,6 +3000,10 @@ void snd_hda_codec_shutdown(struct hda_codec *codec) { struct hda_pcm *cpcm;

+ /* Skip the shutdown if codec is not registered */ + if (!codec->registered) + return; + list_for_each_entry(cpcm, &codec->pcm_list_head, list) snd_pcm_suspend_all(cpcm->pcm);