tree d6adcd686919c9107d638966aee06bb63ee8d5fd
parent 33fa35ed0d7e8996cc68cc2ffc21f12b38fa03c1
author Takashi Iwai <tiwai@suse.de> 1225987870 +0100
committer Takashi Iwai <tiwai@suse.de> 1225988988 +0100

ALSA: hda - Make codec-probing more robust

When an error occurs during the codec probing, typically accessing to an
non-existing codec slot, the controller chip gets often screwed up and
can no longer communicate with the codecs.

This patch adds a preparation phase just to probe codec addresses before
actually creating codec instances.  If any error occurs during this
probing phase, the driver resets the controller to recover.

This will (hopefully) fix the famous "single_cmd" errors.

Signed-off-by: Takashi Iwai <tiwai@suse.de>