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| author | FUJITA Tomonori <tomof@acm.org> | 2008-02-04 22:28:05 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 09:44:11 -0800 |
| commit | 860ac568e825b623b0b335ca277dd47d1d7fd5d0 (patch) | |
| tree | efdf476e1bbf564d62935f86c3467a4c4f4a7fc6 /drivers/scsi | |
| parent | d1b5163206769aa93271bc1029e877ea9f920a5d (diff) | |
| download | lwn-860ac568e825b623b0b335ca277dd47d1d7fd5d0.tar.gz lwn-860ac568e825b623b0b335ca277dd47d1d7fd5d0.zip | |
iommu sg merging: call blk_queue_segment_boundary in __scsi_alloc_queue
request_queue and device struct must have the same value of a segment
size limit. This patch adds blk_queue_segment_boundary in
__scsi_alloc_queue so LLDs don't need to call both
blk_queue_segment_boundary and set_dma_max_seg_size. A LLD can change
the default value (64KB) can call device_dma_parameters accessors like
pci_set_dma_max_seg_size when allocating scsi_host.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jeff Garzik <jeff@garzik.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index b12fb310e399..68e424f09acb 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1569,6 +1569,7 @@ struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost, request_fn_proc *request_fn) { struct request_queue *q; + struct device *dev = shost->shost_gendev.parent; q = blk_init_queue(request_fn, NULL); if (!q) @@ -1584,6 +1585,8 @@ struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost, blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost)); blk_queue_segment_boundary(q, shost->dma_boundary); + blk_queue_max_segment_size(q, dma_get_max_seg_size(dev)); + if (!shost->use_clustering) clear_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags); |