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| author | Zhaolei <zhaolei@cn.fujitsu.com> | 2008-11-14 09:44:33 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-11-18 15:08:56 +0100 |
| commit | 68aee07f9bad2c830a898cf6d6bfc11ea24efc40 (patch) | |
| tree | b0d2e14a19c16ab3022ec94641828df71b560c06 | |
| parent | 561ec68e4de7947167937c49c451728e6b19e63b (diff) | |
| download | linux-68aee07f9bad2c830a898cf6d6bfc11ea24efc40.tar.bz2 | |
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>
| -rw-r--r-- | drivers/block/xen-blkfront.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index b220c686089d..2d19f0cc47f2 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -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); |