Commit e5b50ada authored Oct 08, 2014 by Takashi Iwai

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>

parent 6d16941a

sound/core/misc.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -145,6 +145,8 @@ EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
		const struct snd_pci_quirk *
		snd_pci_quirk_lookup(struct pci_dev pci, const struct snd_pci_quirk list)
		{
		if (!pci)
		return NULL;
		return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
		pci->subsystem_device,
		list);