ALSA: hda - Fix oops caused by recent commit "Fix internal mic for Lenovo Ideapad U300s"

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

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

1 files changed, 3 insertions, 1 deletions

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index cbe115b6c80c..abb59f472d48 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]);