iscsi_iser does not have any hardware DMA restrictions. Add a
slave_configure function to remove any DMA alignment restriction,
allowing the use of direct IO from arbitrary offsets within a page.
Also disable page bouncing; iser has no restrictions on which pages it
can address.
Signed-off-by: Pete Wyckoff <pw@xxxxxxx>
---
drivers/infiniband/ulp/iser/iscsi_iser.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index be1b9fb..1b272a6 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -543,6 +543,13 @@ iscsi_iser_ep_disconnect(__u64 ep_handle)
iser_conn_terminate(ib_conn);
}
+static int iscsi_iser_slave_configure(struct scsi_device *sdev)
+{
+ blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_ANY);
+ 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 +563,7 @@ 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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