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Ming Lei
2b504bd484
We never insert flush request into scheduler queue before. Recently commitd92ca9d834("blk-mq: don't handle non-flush requests in blk_insert_flush") tries to handle FUA data request as normal request. This way has caused warning[1] in mq-deadline dd_exit_sched() or io hang in case of kyber since RQF_ELVPRIV isn't set for flush request, then ->finish_request won't be called. Fix the issue by inserting FUA data request with blk_mq_request_bypass_insert() when the device supports FUA, just like what we did before. [1] https://lore.kernel.org/linux-block/CAHj4cs-_vkTW=dAzbZYGxpEWSpzpcmaNeY1R=vH311+9vMUSdg@mail.gmail.com/ Reported-by: Yi Zhang <[email protected]> Fixes:d92ca9d834("blk-mq: don't handle non-flush requests in blk_insert_flush") Cc: Christoph Hellwig <[email protected]> Signed-off-by: Ming Lei <[email protected]> Reviewed-by: Bart Van Assche <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jens Axboe <[email protected]>