block: check for timeout function in blk_rq_timed_out()
rq_timed_out_fn might have been unset while the request was in flight, so we need to check for it in blk_rq_timed_out(). Acked-by: NJens Axboe <axboe@kernel.dk> Signed-off-by: NHannes Reinecke <hare@suse.de> Signed-off-by: NStefan Weinhuber <wein@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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