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Release old elevator on change elevator 

We should release old elevator when change to use a new one.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Zhaolei 2008-11-14 09:44:33 +01:00 committed by Jens Axboe
parent 561ec68e4d
commit 68aee07f9b
1 changed files with 7 additions and 1 deletions
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8
drivers/block/xen-blkfront.c
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@ -338,12 +338,18 @@ wait:
static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
{
struct request_queue *rq;
elevator_t *old_e;
rq = blk_init_queue(do_blkif_request, &blkif_io_lock);
if (rq == NULL)
return -1;
elevator_init(rq, "noop");
old_e = rq->elevator;
if (IS_ERR_VALUE(elevator_init(rq, "noop")))
printk(KERN_WARNING
"blkfront: Switch elevator failed, use default\n");
else
elevator_exit(old_e);
/* Hard sector size and max sectors impersonate the equiv. hardware. */
blk_queue_hardsect_size(rq, sector_size);