From 47b4c68660752facfa6247b1fc9ca9d722b8b601 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Wed, 21 Sep 2022 12:17:47 +0100 Subject: io_uring/rw: don't lose partial IO result on fail A partially done read/write may end up in io_req_complete_failed() and loose the result, make sure we return the number of bytes processed. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/05e0879c226bcd53b441bf92868eadd4bf04e2fc.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- io_uring/rw.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'io_uring/rw.c') diff --git a/io_uring/rw.c b/io_uring/rw.c index e50ba72091ac..59c92a4616b8 100644 --- a/io_uring/rw.c +++ b/io_uring/rw.c @@ -954,6 +954,14 @@ static void io_cqring_ev_posted_iopoll(struct io_ring_ctx *ctx) io_cqring_wake(ctx); } +void io_rw_fail(struct io_kiocb *req) +{ + int res; + + res = io_fixup_rw_res(req, req->cqe.res); + io_req_set_res(req, res, req->cqe.flags); +} + int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin) { struct io_wq_work_node *pos, *start, *prev; -- cgit v1.2.1