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| author | Tejun Heo <tj@kernel.org> | 2009-05-08 11:54:13 +0900 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-05-11 09:52:17 +0200 |
| commit | fb3ac7f6b811eac8e0aafa3df1c16ed872e898a8 (patch) | |
| tree | bfd7cab2afe52dc4eba37f6428a42c1e496454b0 /drivers/block/z2ram.c | |
| parent | 6b0bf407b586b6ba8e060ad9979cb2bc3370b7eb (diff) | |
| download | op-kernel-dev-fb3ac7f6b811eac8e0aafa3df1c16ed872e898a8.zip op-kernel-dev-fb3ac7f6b811eac8e0aafa3df1c16ed872e898a8.tar.gz | |
z2ram: dequeue in-flight request
z2ram processes requests one-by-one synchronously and can be easily
converted to dequeueing model. Convert it.
[ Impact: dequeue in-flight request ]
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/block/z2ram.c')
| -rw-r--r-- | drivers/block/z2ram.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c index 6a13838..c909c1a 100644 --- a/drivers/block/z2ram.c +++ b/drivers/block/z2ram.c @@ -70,15 +70,21 @@ static struct gendisk *z2ram_gendisk; static void do_z2_request(struct request_queue *q) { struct request *req; - while ((req = elv_next_request(q)) != NULL) { + + req = elv_next_request(q); + if (req) + blkdev_dequeue_request(req); + + while (req) { unsigned long start = blk_rq_pos(req) << 9; unsigned long len = blk_rq_cur_bytes(req); + int err = 0; if (start + len > z2ram_size) { printk( KERN_ERR DEVICE_NAME ": bad access: block=%lu, count=%u\n", blk_rq_pos(req), blk_rq_cur_sectors(req)); - __blk_end_request_cur(req, -EIO); - continue; + err = -EIO; + goto done; } while (len) { unsigned long addr = start & Z2RAM_CHUNKMASK; @@ -93,7 +99,12 @@ static void do_z2_request(struct request_queue *q) start += size; len -= size; } - __blk_end_request_cur(req, 0); + done: + if (!__blk_end_request_cur(req, err)) { + req = elv_next_request(q); + if (req) + blkdev_dequeue_request(req); + } } } |
