V4L/DVB (9297): cx18: Fix memory leak on card initialization failure

On error exit, the cx18_probe() function did not use the proper entry in
cx18_cards[] with kfree() when card init failed; leaking memory.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx18/cx18-driver.c

@@ -613,6 +613,7 @@ static int __devinit cx18_probe(struct pci_dev *dev,
 				const struct pci_device_id *pci_id)
 {
 	int retval = 0;
+	int i;
 	int vbi_buf_size;
 	u32 devtype;
 	struct cx18 *cx;
@@ -836,8 +837,11 @@ static int __devinit cx18_probe(struct pci_dev *dev,
 	CX18_ERR("Error %d on initialization\n", retval);
 	cx18_log_statistics(cx);
 
-	kfree(cx18_cards[cx18_cards_active]);
-	cx18_cards[cx18_cards_active] = NULL;
+	i = cx->num;
+	spin_lock(&cx18_cards_lock);
+	kfree(cx18_cards[i]);
+	cx18_cards[i] = NULL;
+	spin_unlock(&cx18_cards_lock);
 	return retval;
 }