Several exit paths were more complex than they needed to be. Remove
superfluous conditionals, use labels common cleanup, do not shadow
negative error codes.
Signed-off-by: NDarren Hart (VMware) <dvhart@infradead.org>
Tested-by: NCarlo Caione <carlo@endlessm.com>
Reviewed-by: NAndy Shevchenko <andy.shevchenko@gmail.com>