io_uring/timeout: don't end a linked timeout with 1

A linked timeout that fires cancels the request it is linked to, and
completes with -ETIME if that worked out:

	ret = io_try_cancel(req->tctx, &cd, 0);
	...
	io_req_set_res(req, ret ?: -ETIME, 0);

io_try_cancel() returns 0 or an error, except for requests that are parked
on ->futex_list or ->waitid_list. io_futex_cancel() and io_waitid_cancel()
return the number of requests that they have cancelled, and
io_try_cancel() hands it on.

So the linked timeout of an IORING_OP_FUTEX_WAIT, IORING_OP_FUTEX_WAITV or
IORING_OP_WAITID that it has cancelled completes with 1, each time.

The waitid test of liburing checks for that 1, and has to be changed to
expect -ETIME, which is what the linked timeout of any other request
completes with.

Fixes: f31ecf671ddc ("io_uring: add IORING_OP_WAITID support")
Fixes: 194bb58c6090 ("io_uring: add support for futex wake and wait")
Assisted-by: LLM
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Link: https://patch.msgid.link/20261015-b4-io-uring-fixes-v1-42-c1556f5d7bf5@toxicpanda.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

0 files changed, 0 insertions, 0 deletions