[alsa-devel] [PATCH] Fix oops caused by recent commit "Fix internal mic for Lenovo Ideapad U300s"

[David Henningsson]

Make sure we don't dereference the "quirk" pointer when it is null.

Reported-by: Dan Carpenter <dan.carpenter at oracle.com>
Signed-off-by: David Henningsson <david.henningsson at canonical.com>
---
 sound/pci/hda/patch_conexant.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index cbe115b..abb59f4 100644
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -4441,7 +4441,9 @@ static void apply_fixup(struct hda_codec *codec,
 	struct conexant_spec *spec = codec->spec;
 
 	quirk = snd_pci_quirk_lookup(codec->bus->pci, quirk);
-	if (quirk && table[quirk->value]) {
+	if (!quirk)
+		return;
+	if (table[quirk->value]) {
 		snd_printdd(KERN_INFO "hda_codec: applying pincfg for %s\n",
 			    quirk->name);
 		apply_pincfg(codec, table[quirk->value]);
-- 
1.7.9.1