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[PATCH] Fix on-the-fly switch from cfq i/o scheduler
Don't clear ->elevator_data on exit, if we are switching queues we are overwriting the data of the new io scheduler. Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -2059,10 +2059,8 @@ static void cfq_put_cfqd(struct cfq_data *cfqd)
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if (!atomic_dec_and_test(&cfqd->ref))
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return;
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blk_put_queue(q);
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cfq_shutdown_timer_wq(cfqd);
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q->elevator->elevator_data = NULL;
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blk_put_queue(q);
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mempool_destroy(cfqd->crq_pool);
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kfree(cfqd->crq_hash);
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