[media] cx88: Fix possible leak in cx8802_probe()

In case allocation vb2_dma_sg_init_ctx() fails during cx8802_probe(), the
already allocated cx8802 device structure memory is not freed in the used
exit path. Thus adapt the cleanup handling accordingly. Detected by Coverity
CID 1260065.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/pci/cx88/cx88-mpeg.c

@@ -732,7 +732,7 @@ static int cx8802_probe(struct pci_dev *pci_dev,
 	dev->alloc_ctx = vb2_dma_sg_init_ctx(&pci_dev->dev);
 	if (IS_ERR(dev->alloc_ctx)) {
 		err = PTR_ERR(dev->alloc_ctx);
-		goto fail_core;
+		goto fail_dev;
 	}
 	dev->core = core;
 
@@ -754,6 +754,7 @@ static int cx8802_probe(struct pci_dev *pci_dev,
 
  fail_free:
 	vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
+ fail_dev:
 	kfree(dev);
  fail_core:
 	core->dvbdev = NULL;