Sockets and other non-regular files may actually expect short reads to
happen, don't retry reads for them.

Cc: stable@vger.kernel.org # 5.9+
Suggested-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 fs/io_uring.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 5f6f1e48954e..544d711b2ef0 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c

@@ -3557,6 +3557,9 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
 
 	io_size -= ret;
 copy_iov:
+	if (!(req->flags & REQ_F_ISREG) && ret > 0)
+		goto done;
+
 	ret2 = io_setup_async_rw(req, iovec, inline_vecs, iter, true);
 	if (ret2) {
 		ret = ret2;

-- 
2.24.0