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[BLOCK] update SCSI to use new blk_ordered for barriers

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All ordered request related stuff delegated to HLD.  Midlayer
now doens't deal with ordered setting or prepare_flush
callback.  sd.c updated to deal with blk_queue_ordered
setting.  Currently, ordered tag isn't used as SCSI midlayer
cannot guarantee request ordering.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
This commit is contained in:
Tejun Heo
2006-01-06 09:52:55 +01:00
committed by Jens Axboe
parent 797e7dbbee
commit 461d4e90c8
5 changed files with 20 additions and 95 deletions
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drivers/scsi/hosts.c
-9
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@@ -347,17 +347,8 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
shost->cmd_per_lun = sht->cmd_per_lun;
shost->unchecked_isa_dma = sht->unchecked_isa_dma;
shost->use_clustering = sht->use_clustering;
shost->ordered_flush = sht->ordered_flush;
shost->ordered_tag = sht->ordered_tag;
/*
* hosts/devices that do queueing must support ordered tags
*/
if (shost->can_queue > 1 && shost->ordered_flush) {
printk(KERN_ERR "scsi: ordered flushes don't support queueing\n");
shost->ordered_flush = 0;
}
if (sht->max_host_blocked)
shost->max_host_blocked = sht->max_host_blocked;
else