[media] cx231xx: use after free on error path in probe

We dereference "dev" after it has already been freed.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Cc: stable@vger.kernel.org
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/cx231xx/cx231xx-cards.c

@@ -1412,8 +1412,8 @@ static int cx231xx_usb_probe(struct usb_interface *interface,
 	usb_set_intfdata(interface, NULL);
 err_if:
 	usb_put_dev(udev);
-	kfree(dev);
 	clear_bit(dev->devno, &cx231xx_devused);
+	kfree(dev);
 	return retval;
 }