3383977fad
Propagate REQ_DISCARD in cmd_flags when cloning a discard request. Skip blk_rq_check_limits's existing checks for discard requests because discard limits will have already been checked in blkdev_issue_discard. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>