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authorTejun Heo <tj@kernel.org>2012-03-06 21:24:55 +0100
committerJens Axboe <axboe@kernel.dk>2012-03-06 21:24:55 +0100
commitb855b04a0b2213dbc1b59cf936056726e7ed97ad (patch)
tree26a432c7f8d014531059a3f0789199d3dde2e3da /block/Kconfig.iosched
parentea5f4db8ece896c2ab9eafa0924148a2596c52e4 (diff)
downloadlinux-0-day-b855b04a0b2213dbc1b59cf936056726e7ed97ad.tar.gz
block: blk-throttle should be drained regardless of q->elevator
Currently, blk_cleanup_queue() doesn't call elv_drain_elevator() if q->elevator doesn't exist; however, bio based drivers don't have elevator initialized but can still use blk-throttle. This patch moves q->elevator test inside blk_drain_queue() such that only elv_drain_elevator() is skipped if !q->elevator. -v2: loop can have registered queue which has NULL request_fn. Make sure we don't call into __blk_run_queue() in such cases. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Vivek Goyal <vgoyal@redhat.com> Fold in bug fix from Vivek. Signed-off-by: Jens Axboe <axboe@kernel.dk>
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