Thanks to James pointing out the problems with the BLK_BOUNCE_ANY
for IB devices, this revised patch contains only the DMA alignment
fix for iSER.
Mike, can you take care of this and the other two patches in the
series:
[PATCH 2/3] iscsi iser: increase max_sectors
[PATCH 3/3] iscsi iser: increase sg_tablesize
-- Pete
>From 255e73b67ec1458af18395981fddebdc958e8fe9 Mon Sep 17 00:00:00 2001
From: Pete Wyckoff <pw@xxxxxxx>
Date: Thu, 14 Feb 2008 16:09:27 -0500
Subject: [PATCH] iscsi iser: remove DMA alignment restriction
iscsi_iser does not require any particular DMA aligement
requirement. Add a slave_configure function to set the alignment
to zero, allowing the use of direct IO from arbitrary offsets
within a page.
Signed-off-by: Pete Wyckoff <pw@xxxxxxx>
---
drivers/infiniband/ulp/iser/iscsi_iser.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index be1b9fb..313f102 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -543,6 +543,12 @@ iscsi_iser_ep_disconnect(__u64 ep_handle)
iser_conn_terminate(ib_conn);
}
+static int iscsi_iser_slave_configure(struct scsi_device *sdev)
+{
+ blk_queue_dma_alignment(sdev->request_queue, 0);
+ return 0;
+}
+
static struct scsi_host_template iscsi_iser_sht = {
.module = THIS_MODULE,
.name = "iSCSI Initiator over iSER, v." DRV_VER,
@@ -556,6 +562,7 @@ static struct scsi_host_template iscsi_iser_sht = {
.eh_device_reset_handler= iscsi_eh_device_reset,
.eh_host_reset_handler = iscsi_eh_host_reset,
.use_clustering = DISABLE_CLUSTERING,
+ .slave_configure = iscsi_iser_slave_configure,
.proc_name = "iscsi_iser",
.this_id = -1,
};
--
1.5.3.8
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