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authorPavel Begunkov <asml.silence@gmail.com>2022-09-27 02:44:40 +0300
committerJens Axboe <axboe@kernel.dk>2022-09-27 03:44:15 +0300
commitc278d9f8ac0db5590909e6d9e85b5ca2b786704f (patch)
tree5958db703e17e7b72d7c8e482d063a3678720e66 /io_uring/rw.c
parentbf68b5b34311ee57ed40749a1257a30b46127556 (diff)
downloadlinux-c278d9f8ac0db5590909e6d9e85b5ca2b786704f.tar.xz
io_uring/rw: don't lose short results on io_setup_async_rw()
If a retry io_setup_async_rw() fails we lose result from the first io_iter_do_read(), which is a problem mostly for streams/sockets. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/0e8d20cebe5fc9c96ed268463c394237daabc384.1664235732.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/rw.c')
-rw-r--r--io_uring/rw.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/io_uring/rw.c b/io_uring/rw.c
index ed14322aadb9..1ae1e52ab4cb 100644
--- a/io_uring/rw.c
+++ b/io_uring/rw.c
@@ -764,10 +764,12 @@ int io_read(struct io_kiocb *req, unsigned int issue_flags)
iov_iter_restore(&s->iter, &s->iter_state);
ret2 = io_setup_async_rw(req, iovec, s, true);
- if (ret2)
- return ret2;
-
iovec = NULL;
+ if (ret2) {
+ ret = ret > 0 ? ret : ret2;
+ goto done;
+ }
+
io = req->async_data;
s = &io->s;
/*