iser: Accept arbitrary sg lists mapping if the device supports it

[cascardo/linux.git] / drivers / infiniband / ulp / iser / iscsi_iser.c

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index c827c93..80b6bed 100644 (file)
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -969,7 +969,16 @@ static umode_t iser_attr_is_visible(int param_type, int param)
 
 static int iscsi_iser_slave_alloc(struct scsi_device *sdev)
 {
-       blk_queue_virt_boundary(sdev->request_queue, ~MASK_4K);
+       struct iscsi_session *session;
+       struct iser_conn *iser_conn;
+       struct ib_device *ib_dev;
+
+       session = starget_to_session(scsi_target(sdev))->dd_data;
+       iser_conn = session->leadconn->dd_data;
+       ib_dev = iser_conn->ib_conn.device->ib_device;
+
+       if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_SG_GAPS_REG))
+               blk_queue_virt_boundary(sdev->request_queue, ~MASK_4K);
 
        return 0;
 }