linux-kernel - [PATCH -mm 09/11] call blk_queue_segment_boundary in __scsi_alloc

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Message-Id: <20071024172611B.tomof@acm.org>
Date:	Wed, 24 Oct 2007 19:48:30 +0900
From:	FUJITA Tomonori <tomof@....org>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	James.Bottomley@...elEye.com, jeff@...zik.org,
	fujita.tomonori@....ntt.co.jp
Subject: [PATCH -mm 09/11] 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@....ntt.co.jp>
---
 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 61fdaf0..23a30ab 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1645,6 +1645,7 @@ 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)
@@ -1673,6 +1674,8 @@ 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);
 	return q;
-- 
1.5.2.4

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