io_uring: fix timeout cancel return code
When we cancel a timeout we should emit a sensible return code, like -ECANCELED but not 0, otherwise it may trick users. Signed-off-by:Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/7b0ad1065e3bd1994722702bd0ba9e7bc9b0683b.1616696997.git.asml.silence@gmail.com Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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