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io_uring: remove timeout.list after hrtimer cancel

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Remove timeouts from ctx->timeout_list after hrtimer_try_to_cancel()
successfully cancels it. With this we don't need to care whether there
was a race and it was removed in io_timeout_fn(), and that will be handy
for following patches.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2020-10-10 18:34:11 +01:00 committed by Jens Axboe
parent 0bdf7a2ddb
commit a71976f3fa
1 changed files with 2 additions and 9 deletions
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11
fs/io_uring.c
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@ -5301,16 +5301,10 @@ static enum hrtimer_restart io_timeout_fn(struct hrtimer *timer)
unsigned long flags;
spin_lock_irqsave(&ctx->completion_lock, flags);
list_del_init(&req->timeout.list);
atomic_set(&req->ctx->cq_timeouts,
atomic_read(&req->ctx->cq_timeouts) + 1);
/*
* We could be racing with timeout deletion. If the list is empty,
* then timeout lookup already found it and will be handling it.
*/
if (!list_empty(&req->timeout.list))
list_del_init(&req->timeout.list);
io_cqring_fill_event(req, -ETIME);
io_commit_cqring(ctx);
spin_unlock_irqrestore(&ctx->completion_lock, flags);
@ -5326,11 +5320,10 @@ static int __io_timeout_cancel(struct io_kiocb *req)
struct io_timeout_data *io = req->async_data;
int ret;
list_del_init(&req->timeout.list);
ret = hrtimer_try_to_cancel(&io->timer);
if (ret == -1)
return -EALREADY;
list_del_init(&req->timeout.list);
req_set_fail_links(req);
req->flags |= REQ_F_COMP_LOCKED;