From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 8 Oct 2014 10:08:38 +0000 (+0200)
Subject: ALSA: Allow pass NULL dev for snd_pci_quirk_lookup()
X-Git-Tag: fixes-against-v3.18-rc2~128^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5b50ada76f44c8742a123813689bff4db062a5a;p=pandora-kernel.git

ALSA: Allow pass NULL dev for snd_pci_quirk_lookup()

Add a NULL check in snd_pci_quirk_lookup() so that NULL can be passed
as a pci_dev pointer.  This fixes the possible NULL dereferences in
HD-audio drivers.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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