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ALSA: hda - Clear the leftover component assignment at snd_hdac_i915_exit()

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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@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Kouta Okamoto <kouta.okamoto@toshiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2016-03-29 12:29:24 +02:00 • committed by Greg Kroah-Hartman
parent 7f3e85d820
commit ef24d642e9
1 changed files with 1 additions and 0 deletions
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sound/hda/hdac_i915.c
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@ -273,6 +273,7 @@ int snd_hdac_i915_exit(struct hdac_bus *bus)
kfree(acomp); kfree(acomp);
bus->audio_component = NULL; bus->audio_component = NULL;
hdac_acomp = NULL;
return 0; return 0;
} }