From 461d4e90c8cd049718884cd17c955e231140d3be Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 6 Jan 2006 09:52:55 +0100 Subject: [BLOCK] update SCSI to use new blk_ordered for barriers 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 Signed-off-by: Jens Axboe --- drivers/scsi/scsi_lib.c | 46 ---------------------------------------------- 1 file changed, 46 deletions(-) (limited to 'drivers/scsi/scsi_lib.c') diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 53551f1dfe2..7a38b101976 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -932,9 +932,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes, int sense_valid = 0; int sense_deferred = 0; - if (blk_complete_barrier_rq(q, req, good_bytes >> 9)) - return; - /* * Free up any indirection buffers we allocated for DMA purposes. * For the case of a READ, we need to copy the data out of the @@ -1199,38 +1196,6 @@ static int scsi_init_io(struct scsi_cmnd *cmd) return BLKPREP_KILL; } -static int scsi_prepare_flush_fn(request_queue_t *q, struct request *rq) -{ - struct scsi_device *sdev = q->queuedata; - struct scsi_driver *drv; - - if (sdev->sdev_state == SDEV_RUNNING) { - drv = *(struct scsi_driver **) rq->rq_disk->private_data; - - if (drv->prepare_flush) - return drv->prepare_flush(q, rq); - } - - return 0; -} - -static void scsi_end_flush_fn(request_queue_t *q, struct request *rq) -{ - struct scsi_device *sdev = q->queuedata; - struct request *flush_rq = rq->end_io_data; - struct scsi_driver *drv; - - if (flush_rq->errors) { - printk("scsi: barrier error, disabling flush support\n"); - blk_queue_ordered(q, QUEUE_ORDERED_NONE); - } - - if (sdev->sdev_state == SDEV_RUNNING) { - drv = *(struct scsi_driver **) rq->rq_disk->private_data; - drv->end_flush(q, rq); - } -} - static int scsi_issue_flush_fn(request_queue_t *q, struct gendisk *disk, sector_t *error_sector) { @@ -1703,17 +1668,6 @@ struct request_queue *scsi_alloc_queue(struct scsi_device *sdev) blk_queue_segment_boundary(q, shost->dma_boundary); blk_queue_issue_flush_fn(q, scsi_issue_flush_fn); - /* - * ordered tags are superior to flush ordering - */ - if (shost->ordered_tag) - blk_queue_ordered(q, QUEUE_ORDERED_TAG); - else if (shost->ordered_flush) { - blk_queue_ordered(q, QUEUE_ORDERED_FLUSH); - q->prepare_flush_fn = scsi_prepare_flush_fn; - q->end_flush_fn = scsi_end_flush_fn; - } - if (!shost->use_clustering) clear_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags); return q; -- cgit v1.2.2