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Jens Axboe authored
It's possible for a file type to support uring commands, but not pollable ones. Hence before issuing one of those, we should check that it is supported and error out upfront if it isn't. Cc: stable@vger.kernel.org Fixes: 5756a3a7 ("io_uring: add iopoll infrastructure for io_uring_cmd") Link: https://github.com/axboe/liburing/issues/816Reviewed-by: Kanchan Joshi <joshi.k@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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