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| author |   FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-07-03 17:45:34 +0900 |
|---|---|---|
| committer |   Jens Axboe <jaxboe@fusionio.com> | 2010-08-07 18:23:58 +0200 |
| commit | 90467c294aba7f911bdae72ed86995cf1de4d364 (patch) | |
| tree | f1b516586b02a477d78ccc627b0c298c2be982a3 /drivers/scsi | |
| parent | block: permit PREFLUSH and POSTFLUSH without prepare_flush_fn (diff) | |
| download | linux-dev-90467c294aba7f911bdae72ed86995cf1de4d364.tar.xz linux-dev-90467c294aba7f911bdae72ed86995cf1de4d364.zip | |
scsi: stop using q->prepare_flush_fn
scsi-ml builds flush requests via q->prepare_flush_fn(), however,
builds discard requests via q->prep_rq_fn.
Using two different mechnisms for the similar requests (building
commands in SCSI ULD) doesn't make sense.
Handing both via q->prep_rq_fn makes the code design simpler.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/sd.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index aa6b48ba78b1..e8c295e01466 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -471,6 +471,18 @@ static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) return ret; } +static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) +{ + /* for now, we use REQ_TYPE_BLOCK_PC. */ + rq->cmd_type = REQ_TYPE_BLOCK_PC; + rq->timeout = SD_TIMEOUT; + rq->retries = SD_MAX_RETRIES; + rq->cmd[0] = SYNCHRONIZE_CACHE; + rq->cmd_len = 10; + + return scsi_setup_blk_pc_cmnd(sdp, rq); +} + static void sd_unprep_fn(struct request_queue *q, struct request *rq) { if (rq->cmd_flags & REQ_DISCARD) @@ -504,6 +516,9 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) if (rq->cmd_flags & REQ_DISCARD) { ret = scsi_setup_discard_cmnd(sdp, rq); goto out; + } else if (rq->cmd_flags & REQ_FLUSH) { + ret = scsi_setup_flush_cmnd(sdp, rq); + goto out; } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { ret = scsi_setup_blk_pc_cmnd(sdp, rq); goto out; @@ -1053,15 +1068,6 @@ static int sd_sync_cache(struct scsi_disk *sdkp) return 0; } -static void sd_prepare_flush(struct request_queue *q, struct request *rq) -{ - rq->cmd_type = REQ_TYPE_BLOCK_PC; - rq->timeout = SD_TIMEOUT; - rq->retries = SD_MAX_RETRIES; - rq->cmd[0] = SYNCHRONIZE_CACHE; - rq->cmd_len = 10; -} - static void sd_rescan(struct device *dev) { struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); @@ -2129,7 +2135,7 @@ static int sd_revalidate_disk(struct gendisk *disk) else ordered = QUEUE_ORDERED_DRAIN; - blk_queue_ordered(sdkp->disk->queue, ordered, sd_prepare_flush); + blk_queue_ordered(sdkp->disk->queue, ordered, NULL); set_capacity(disk, sdkp->capacity); kfree(buffer); |