4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Takashi Iwai <tiwai@xxxxxxx> commit faafd03d23c913633d2ef7e6ffebdce01b164409 upstream. The commit [d745f5e7b8b2: ALSA: hda - Add the pin / port mapping on Intel ILK and VLV] introduced a WARN_ON() to check the pointer for avoiding the double initializations. But hdac_acomp pointer wasn't cleared at snd_hdac_i915_exit(), thus after reloading the HD-audio driver, it may result in the false positive warning. This patch makes sure to clear the leftover pointer at exit. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94736 Reported-by: Daniela Doras-prodan <daniela.doras-prodan@xxxxxxxxx> Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> Cc: Kouta Okamoto <kouta.okamoto@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- sound/hda/hdac_i915.c | 1 + 1 file changed, 1 insertion(+) --- a/sound/hda/hdac_i915.c +++ b/sound/hda/hdac_i915.c @@ -273,6 +273,7 @@ int snd_hdac_i915_exit(struct hdac_bus * kfree(acomp); bus->audio_component = NULL; + hdac_acomp = NULL; return 0; }