scsi: IB/iser: set virt_boundary_mask in the scsi host

This ensures all proper DMA layer handling is taken care of by the SCSI
midlayer.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/infiniband/ulp/iser/iscsi_iser.c

@@ -613,6 +613,7 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
 	struct Scsi_Host *shost;
 	struct iser_conn *iser_conn = NULL;
 	struct ib_conn *ib_conn;
+	struct ib_device *ib_dev;
 	u32 max_fr_sectors;
 
 	shost = iscsi_host_alloc(&iscsi_iser_sht, 0, 0);
@@ -643,16 +644,19 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
 		}
 
 		ib_conn = &iser_conn->ib_conn;
+		ib_dev = ib_conn->device->ib_device;
 		if (ib_conn->pi_support) {
-			u32 sig_caps = ib_conn->device->ib_device->attrs.sig_prot_cap;
+			u32 sig_caps = ib_dev->attrs.sig_prot_cap;
 
 			scsi_host_set_prot(shost, iser_dif_prot_caps(sig_caps));
 			scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP |
 						   SHOST_DIX_GUARD_CRC);
 		}
 
-		if (iscsi_host_add(shost,
-				   ib_conn->device->ib_device->dev.parent)) {
+		if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_SG_GAPS_REG))
+			shost->virt_boundary_mask = ~MASK_4K;
+
+		if (iscsi_host_add(shost, ib_dev->dev.parent)) {
 			mutex_unlock(&iser_conn->state_mutex);
 			goto free_host;
 		}
@@ -958,30 +962,6 @@ static umode_t iser_attr_is_visible(int param_type, int param)
 	return 0;
 }
 
-static int iscsi_iser_slave_alloc(struct scsi_device *sdev)
-{
-	struct iscsi_session *session;
-	struct iser_conn *iser_conn;
-	struct ib_device *ib_dev;
-
-	mutex_lock(&unbind_iser_conn_mutex);
-
-	session = starget_to_session(scsi_target(sdev))->dd_data;
-	iser_conn = session->leadconn->dd_data;
-	if (!iser_conn) {
-		mutex_unlock(&unbind_iser_conn_mutex);
-		return -ENOTCONN;
-	}
-	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);
-
-	mutex_unlock(&unbind_iser_conn_mutex);
-
-	return 0;
-}
-
 static struct scsi_host_template iscsi_iser_sht = {
 	.module                 = THIS_MODULE,
 	.name                   = "iSCSI Initiator over iSER",
@@ -994,7 +974,6 @@ static struct scsi_host_template iscsi_iser_sht = {
 	.eh_device_reset_handler= iscsi_eh_device_reset,
 	.eh_target_reset_handler = iscsi_eh_recover_target,
 	.target_alloc		= iscsi_target_alloc,
-	.slave_alloc            = iscsi_iser_slave_alloc,
 	.proc_name              = "iscsi_iser",
 	.this_id                = -1,
 	.track_queue_depth	= 1,