ALSA: hda/ca0132 - Fix possible NULL dereference

Spotted by smatch,
  sound/pci/hda/patch_ca0132.c:1950 dspxfr_image() error: potential
  null dereference 'dma_engine'.  (kzalloc returns null)
  sound/pci/hda/patch_ca0132.c:1950 dspxfr_image() error: we
  previously assumed 'dma_engine' could be null (see line 1857)

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

1 files changed, 4 insertions, 6 deletions

diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c
index f6c949039cab..ee2b9c6600ff 100644
--- a/sound/pci/hda/patch_ca0132.c
+++ b/sound/pci/hda/patch_ca0132.c
@@ -2416,15 +2416,13 @@ static int dspxfr_image(struct hda_codec *codec,
                 return -EINVAL;
 
         dma_engine = kzalloc(sizeof(*dma_engine), GFP_KERNEL);
-        if (!dma_engine) {
-                status = -ENOMEM;
-                goto exit;
-        }
+        if (!dma_engine)
+                return -ENOMEM;
 
         dma_engine->dmab = kzalloc(sizeof(*dma_engine->dmab), GFP_KERNEL);
         if (!dma_engine->dmab) {
-                status = -ENOMEM;
-                goto exit;
+                kfree(dma_engine);
+                return -ENOMEM;
         }
 
         dma_engine->codec = codec;