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authorMengdong Lin <mengdong.lin@intel.com>2013-03-07 14:11:05 -0500
committerTakashi Iwai <tiwai@suse.de>2013-03-07 09:14:03 +0100
commit4c7a548a70a44269266858f65c3b5fc9c3ace057 (patch)
tree826810f4e37ffe5a315345842a399ad1135b36d6 /sound
parent25336e8ae2d2fa64c9c4cc2c9c28f641134c9fa9 (diff)
downloadvexpress-lsk-4c7a548a70a44269266858f65c3b5fc9c3ace057.tar.gz
ALSA: hda - check NULL pointer when creating SPDIF PCM switch
If the new control cannot be created, this function will return to avoid snd_hda_ctl_add dereferencing a NULL control pointer. Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/hda_codec.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 3dc656688c0..97c68dd24ef 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3433,11 +3433,16 @@ static struct snd_kcontrol_new spdif_share_sw = {
int snd_hda_create_spdif_share_sw(struct hda_codec *codec,
struct hda_multi_out *mout)
{
+ struct snd_kcontrol *kctl;
+
if (!mout->dig_out_nid)
return 0;
+
+ kctl = snd_ctl_new1(&spdif_share_sw, mout);
+ if (!kctl)
+ return -ENOMEM;
/* ATTENTION: here mout is passed as private_data, instead of codec */
- return snd_hda_ctl_add(codec, mout->dig_out_nid,
- snd_ctl_new1(&spdif_share_sw, mout));
+ return snd_hda_ctl_add(codec, mout->dig_out_nid, kctl);
}
EXPORT_SYMBOL_HDA(snd_hda_create_spdif_share_sw);