io_uring: never attempt iopoll reissue from release path
There are two reasons why this shouldn't be done: 1) Ring is exiting, and we're canceling requests anyway. Any request should be canceled anyway. In theory, this could iterate for a number of times if someone else is also driving the target block queue into request starvation, however the likelihood of this happening is miniscule. 2) If the original task decided to pass the ring to another task, then we don't want to be reissuing from this context as it may be an unrelated task or context. No assumptions should be made about the context in which ->release() is run. This can only happen for pure read/write, and we'll get -EFAULT on them anyway. Link: https://lore.kernel.org/io-uring/YPr4OaHv0iv0KTOc@zeniv-ca.linux.org.uk/ Reported-by:Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
0cc936f7
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