UPSTREAM: io_uring: improve send/recv error handling

commit 7297ce3d upstream.

Hide all error handling under common if block, removes two extra ifs on
the success path and keeps the handling more condensed.

Change-Id: If6864c8ddd06bc853cef6b543fc06cf99d9ad147
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/5761545158a12968f3caf30f747eea65ed75dfc1.1637524285.git.asml.silence@gmail.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Bug: 268174392
(cherry picked from commit abdc16c8)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>