io_uring: fix cached_sq_head in io_timeout()

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io_timeout() can be executed asynchronously by a worker and without
holding ctx->uring_lock

1. using ctx->cached_sq_head there is racy there
2. it should count events from a moment of timeout's submission, but
not execution

Use req->sequence.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2020-04-15 00:39:48 +03:00 • committed by Jens Axboe

parent 8e2e1faf28

commit 22cad1585c

1 changed files with 8 additions and 7 deletions

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fs/io_uring.c

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