Commit 33940d09 authored by Joern Engel's avatar Joern Engel Committed by Nicholas Bellinger
Browse files

target: encapsulate smp_mb__after_atomic() 



The target code has a rather generous helping of smp_mb__after_atomic()
throughout the code base.  Most atomic operations were followed by one
and none were preceded by smp_mb__before_atomic(), nor accompanied by a
comment explaining the need for a barrier.

Instead of trying to prove for every case whether or not it is needed,
this patch introduces atomic_inc_mb() and atomic_dec_mb(), which
explicitly include the memory barriers before and after the atomic
operation.  For now they are defined in a target header, although they
could be of general use.

Most of the existing atomic/mb combinations were replaced by the new
helpers.  In a few cases the atomic was sandwiched in
spin_lock/spin_unlock and I simply removed the barrier.

I suspect that in most cases the correct conversion would have been to
drop the barrier.  I also suspect that a few cases exist where a) the
barrier was necessary and b) a second barrier before the atomic would
have been necessary and got added by this patch.

Signed-off-by: default avatarJoern Engel <joern@logfs.org>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 74ed7e62

drivers/target/loopback/tcm_loop.c

+2 −4
Original line number Diff line number Diff line
@@ -960,8 +960,7 @@ static int tcm_loop_port_link( 
				struct tcm_loop_tpg, tl_se_tpg);

	struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;



	atomic_inc(&tl_tpg->tl_tpg_port_count);

	smp_mb__after_atomic();

	atomic_inc_mb(&tl_tpg->tl_tpg_port_count);

	/*

	 * Add Linux/SCSI struct scsi_device by HCTL

	 */
@@ -995,8 +994,7 @@ static void tcm_loop_port_unlink( 
	scsi_remove_device(sd);

	scsi_device_put(sd);



	atomic_dec(&tl_tpg->tl_tpg_port_count);

	smp_mb__after_atomic();

	atomic_dec_mb(&tl_tpg->tl_tpg_port_count);



	pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n");

}

drivers/target/target_core_alua.c

+10 −23
Original line number Diff line number Diff line
@@ -392,8 +392,7 @@ target_emulate_set_target_port_groups(struct se_cmd *cmd) 
				if (tg_pt_id != tg_pt_gp->tg_pt_gp_id)

					continue;



				atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);

				smp_mb__after_atomic();

				atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt);



				spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
@@ -403,8 +402,7 @@ target_emulate_set_target_port_groups(struct se_cmd *cmd) 
					found = true;



				spin_lock(&dev->t10_alua.tg_pt_gps_lock);

				atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);

				smp_mb__after_atomic();

				atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt);

				break;

			}

			spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
@@ -998,8 +996,7 @@ static void core_alua_do_transition_tg_pt_work(struct work_struct *work) 
		 * every I_T nexus other than the I_T nexus on which the SET

		 * TARGET PORT GROUPS command

		 */

		atomic_inc(&mem->tg_pt_gp_mem_ref_cnt);

		smp_mb__after_atomic();

		atomic_inc_mb(&mem->tg_pt_gp_mem_ref_cnt);

		spin_unlock(&tg_pt_gp->tg_pt_gp_lock);



		spin_lock_bh(&port->sep_alua_lock);
@@ -1028,8 +1025,7 @@ static void core_alua_do_transition_tg_pt_work(struct work_struct *work) 
		spin_unlock_bh(&port->sep_alua_lock);



		spin_lock(&tg_pt_gp->tg_pt_gp_lock);

		atomic_dec(&mem->tg_pt_gp_mem_ref_cnt);

		smp_mb__after_atomic();

		atomic_dec_mb(&mem->tg_pt_gp_mem_ref_cnt);

	}

	spin_unlock(&tg_pt_gp->tg_pt_gp_lock);

	/*
@@ -1063,7 +1059,6 @@ static void core_alua_do_transition_tg_pt_work(struct work_struct *work) 
		core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_pending_state));

	spin_lock(&dev->t10_alua.tg_pt_gps_lock);

	atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);

	smp_mb__after_atomic();

	spin_unlock(&dev->t10_alua.tg_pt_gps_lock);



	if (tg_pt_gp->tg_pt_gp_transition_complete)
@@ -1125,7 +1120,6 @@ static int core_alua_do_transition_tg_pt( 
	 */

	spin_lock(&dev->t10_alua.tg_pt_gps_lock);

	atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);

	smp_mb__after_atomic();

	spin_unlock(&dev->t10_alua.tg_pt_gps_lock);



	if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs) {
@@ -1168,7 +1162,6 @@ int core_alua_do_port_transition( 
	spin_lock(&local_lu_gp_mem->lu_gp_mem_lock);

	lu_gp = local_lu_gp_mem->lu_gp;

	atomic_inc(&lu_gp->lu_gp_ref_cnt);

	smp_mb__after_atomic();

	spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock);

	/*

	 * For storage objects that are members of the 'default_lu_gp',
@@ -1184,8 +1177,7 @@ int core_alua_do_port_transition( 
		l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl;

		rc = core_alua_do_transition_tg_pt(l_tg_pt_gp,

						   new_state, explicit);

		atomic_dec(&lu_gp->lu_gp_ref_cnt);

		smp_mb__after_atomic();

		atomic_dec_mb(&lu_gp->lu_gp_ref_cnt);

		return rc;

	}

	/*
@@ -1198,8 +1190,7 @@ int core_alua_do_port_transition( 
				lu_gp_mem_list) {



		dev = lu_gp_mem->lu_gp_mem_dev;

		atomic_inc(&lu_gp_mem->lu_gp_mem_ref_cnt);

		smp_mb__after_atomic();

		atomic_inc_mb(&lu_gp_mem->lu_gp_mem_ref_cnt);

		spin_unlock(&lu_gp->lu_gp_lock);



		spin_lock(&dev->t10_alua.tg_pt_gps_lock);
@@ -1227,8 +1218,7 @@ int core_alua_do_port_transition( 
				tg_pt_gp->tg_pt_gp_alua_port = NULL;

				tg_pt_gp->tg_pt_gp_alua_nacl = NULL;

			}

			atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);

			smp_mb__after_atomic();

			atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt);

			spin_unlock(&dev->t10_alua.tg_pt_gps_lock);

			/*

			 * core_alua_do_transition_tg_pt() will always return
@@ -1238,16 +1228,14 @@ int core_alua_do_port_transition( 
					new_state, explicit);



			spin_lock(&dev->t10_alua.tg_pt_gps_lock);

			atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);

			smp_mb__after_atomic();

			atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt);

			if (rc)

				break;

		}

		spin_unlock(&dev->t10_alua.tg_pt_gps_lock);



		spin_lock(&lu_gp->lu_gp_lock);

		atomic_dec(&lu_gp_mem->lu_gp_mem_ref_cnt);

		smp_mb__after_atomic();

		atomic_dec_mb(&lu_gp_mem->lu_gp_mem_ref_cnt);

	}

	spin_unlock(&lu_gp->lu_gp_lock);
@@ -1260,8 +1248,7 @@ int core_alua_do_port_transition( 
			 core_alua_dump_state(new_state));

	}



	atomic_dec(&lu_gp->lu_gp_ref_cnt);

	smp_mb__after_atomic();

	atomic_dec_mb(&lu_gp->lu_gp_ref_cnt);

	return rc;

}

drivers/target/target_core_device.c

+3 −6
Original line number Diff line number Diff line
@@ -224,8 +224,7 @@ struct se_dev_entry *core_get_se_deve_from_rtpi( 
		if (port->sep_rtpi != rtpi)

			continue;



		atomic_inc(&deve->pr_ref_count);

		smp_mb__after_atomic();

		atomic_inc_mb(&deve->pr_ref_count);

		spin_unlock_irq(&nacl->device_list_lock);



		return deve;
@@ -1388,8 +1387,7 @@ int core_dev_add_initiator_node_lun_acl( 


	spin_lock(&lun->lun_acl_lock);

	list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);

	atomic_inc(&lun->lun_acl_count);

	smp_mb__after_atomic();

	atomic_inc_mb(&lun->lun_acl_count);

	spin_unlock(&lun->lun_acl_lock);



	pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
@@ -1422,8 +1420,7 @@ int core_dev_del_initiator_node_lun_acl( 


	spin_lock(&lun->lun_acl_lock);

	list_del(&lacl->lacl_list);

	atomic_dec(&lun->lun_acl_count);

	smp_mb__after_atomic();

	atomic_dec_mb(&lun->lun_acl_count);

	spin_unlock(&lun->lun_acl_lock);



	core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,

drivers/target/target_core_pr.c

+30 −60
Original line number Diff line number Diff line
@@ -674,8 +674,7 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration( 
	 */

	spin_lock(&dev->se_port_lock);

	list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) {

		atomic_inc(&port->sep_tg_pt_ref_cnt);

		smp_mb__after_atomic();

		atomic_inc_mb(&port->sep_tg_pt_ref_cnt);

		spin_unlock(&dev->se_port_lock);



		spin_lock_bh(&port->sep_alua_lock);
@@ -709,8 +708,7 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration( 
			if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname))

				continue;



			atomic_inc(&deve_tmp->pr_ref_count);

			smp_mb__after_atomic();

			atomic_inc_mb(&deve_tmp->pr_ref_count);

			spin_unlock_bh(&port->sep_alua_lock);

			/*

			 * Grab a configfs group dependency that is released
@@ -722,10 +720,8 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration( 
			if (ret < 0) {

				pr_err("core_scsi3_lunacl_depend"

						"_item() failed\n");

				atomic_dec(&port->sep_tg_pt_ref_cnt);

				smp_mb__after_atomic();

				atomic_dec(&deve_tmp->pr_ref_count);

				smp_mb__after_atomic();

				atomic_dec_mb(&port->sep_tg_pt_ref_cnt);

				atomic_dec_mb(&deve_tmp->pr_ref_count);

				goto out;

			}

			/*
@@ -739,10 +735,8 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration( 
						nacl_tmp, deve_tmp, NULL,

						sa_res_key, all_tg_pt, aptpl);

			if (!pr_reg_atp) {

				atomic_dec(&port->sep_tg_pt_ref_cnt);

				smp_mb__after_atomic();

				atomic_dec(&deve_tmp->pr_ref_count);

				smp_mb__after_atomic();

				atomic_dec_mb(&port->sep_tg_pt_ref_cnt);

				atomic_dec_mb(&deve_tmp->pr_ref_count);

				core_scsi3_lunacl_undepend_item(deve_tmp);

				goto out;

			}
@@ -754,8 +748,7 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration( 
		spin_unlock_bh(&port->sep_alua_lock);



		spin_lock(&dev->se_port_lock);

		atomic_dec(&port->sep_tg_pt_ref_cnt);

		smp_mb__after_atomic();

		atomic_dec_mb(&port->sep_tg_pt_ref_cnt);

	}

	spin_unlock(&dev->se_port_lock);
@@ -1109,8 +1102,7 @@ static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 
				if (dev->dev_attrib.enforce_pr_isids)

					continue;

			}

			atomic_inc(&pr_reg->pr_res_holders);

			smp_mb__after_atomic();

			atomic_inc_mb(&pr_reg->pr_res_holders);

			spin_unlock(&pr_tmpl->registration_lock);

			return pr_reg;

		}
@@ -1124,8 +1116,7 @@ static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 
		if (strcmp(isid, pr_reg->pr_reg_isid))

			continue;



		atomic_inc(&pr_reg->pr_res_holders);

		smp_mb__after_atomic();

		atomic_inc_mb(&pr_reg->pr_res_holders);

		spin_unlock(&pr_tmpl->registration_lock);

		return pr_reg;

	}
@@ -1154,8 +1145,7 @@ static struct t10_pr_registration *core_scsi3_locate_pr_reg( 


static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg)

{

	atomic_dec(&pr_reg->pr_res_holders);

	smp_mb__after_atomic();

	atomic_dec_mb(&pr_reg->pr_res_holders);

}



static int core_scsi3_check_implicit_release(
@@ -1348,8 +1338,7 @@ static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) 
	configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,

			&tpg->tpg_group.cg_item);



	atomic_dec(&tpg->tpg_pr_ref_count);

	smp_mb__after_atomic();

	atomic_dec_mb(&tpg->tpg_pr_ref_count);

}



static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl)
@@ -1368,16 +1357,14 @@ static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) 
	struct se_portal_group *tpg = nacl->se_tpg;



	if (nacl->dynamic_node_acl) {

		atomic_dec(&nacl->acl_pr_ref_count);

		smp_mb__after_atomic();

		atomic_dec_mb(&nacl->acl_pr_ref_count);

		return;

	}



	configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,

			&nacl->acl_group.cg_item);



	atomic_dec(&nacl->acl_pr_ref_count);

	smp_mb__after_atomic();

	atomic_dec_mb(&nacl->acl_pr_ref_count);

}



static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve)
@@ -1407,8 +1394,7 @@ static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 
	 * For nacl->dynamic_node_acl=1

	 */

	if (!lun_acl) {

		atomic_dec(&se_deve->pr_ref_count);

		smp_mb__after_atomic();

		atomic_dec_mb(&se_deve->pr_ref_count);

		return;

	}

	nacl = lun_acl->se_lun_nacl;
@@ -1417,8 +1403,7 @@ static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 
	configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,

			&lun_acl->se_lun_group.cg_item);



	atomic_dec(&se_deve->pr_ref_count);

	smp_mb__after_atomic();

	atomic_dec_mb(&se_deve->pr_ref_count);

}



static sense_reason_t
@@ -1551,15 +1536,13 @@ core_scsi3_decode_spec_i_port( 
			if (!i_str)

				continue;



			atomic_inc(&tmp_tpg->tpg_pr_ref_count);

			smp_mb__after_atomic();

			atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count);

			spin_unlock(&dev->se_port_lock);



			if (core_scsi3_tpg_depend_item(tmp_tpg)) {

				pr_err(" core_scsi3_tpg_depend_item()"

					" for tmp_tpg\n");

				atomic_dec(&tmp_tpg->tpg_pr_ref_count);

				smp_mb__after_atomic();

				atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count);

				ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;

				goto out_unmap;

			}
@@ -1571,10 +1554,8 @@ core_scsi3_decode_spec_i_port( 
			spin_lock_irq(&tmp_tpg->acl_node_lock);

			dest_node_acl = __core_tpg_get_initiator_node_acl(

						tmp_tpg, i_str);

			if (dest_node_acl) {

				atomic_inc(&dest_node_acl->acl_pr_ref_count);

				smp_mb__after_atomic();

			}

			if (dest_node_acl)

				atomic_inc_mb(&dest_node_acl->acl_pr_ref_count);

			spin_unlock_irq(&tmp_tpg->acl_node_lock);



			if (!dest_node_acl) {
@@ -1586,8 +1567,7 @@ core_scsi3_decode_spec_i_port( 
			if (core_scsi3_nodeacl_depend_item(dest_node_acl)) {

				pr_err("configfs_depend_item() failed"

					" for dest_node_acl->acl_group\n");

				atomic_dec(&dest_node_acl->acl_pr_ref_count);

				smp_mb__after_atomic();

				atomic_dec_mb(&dest_node_acl->acl_pr_ref_count);

				core_scsi3_tpg_undepend_item(tmp_tpg);

				ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;

				goto out_unmap;
@@ -1646,8 +1626,7 @@ core_scsi3_decode_spec_i_port( 
		if (core_scsi3_lunacl_depend_item(dest_se_deve)) {

			pr_err("core_scsi3_lunacl_depend_item()"

					" failed\n");

			atomic_dec(&dest_se_deve->pr_ref_count);

			smp_mb__after_atomic();

			atomic_dec_mb(&dest_se_deve->pr_ref_count);

			core_scsi3_nodeacl_undepend_item(dest_node_acl);

			core_scsi3_tpg_undepend_item(dest_tpg);

			ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
@@ -3167,15 +3146,13 @@ core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, 
		if (!dest_tf_ops)

			continue;



		atomic_inc(&dest_se_tpg->tpg_pr_ref_count);

		smp_mb__after_atomic();

		atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count);

		spin_unlock(&dev->se_port_lock);



		if (core_scsi3_tpg_depend_item(dest_se_tpg)) {

			pr_err("core_scsi3_tpg_depend_item() failed"

				" for dest_se_tpg\n");

			atomic_dec(&dest_se_tpg->tpg_pr_ref_count);

			smp_mb__after_atomic();

			atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count);

			ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;

			goto out_put_pr_reg;

		}
@@ -3271,10 +3248,8 @@ after_iport_check: 
	spin_lock_irq(&dest_se_tpg->acl_node_lock);

	dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg,

				initiator_str);

	if (dest_node_acl) {

		atomic_inc(&dest_node_acl->acl_pr_ref_count);

		smp_mb__after_atomic();

	}

	if (dest_node_acl)

		atomic_inc_mb(&dest_node_acl->acl_pr_ref_count);

	spin_unlock_irq(&dest_se_tpg->acl_node_lock);



	if (!dest_node_acl) {
@@ -3288,8 +3263,7 @@ after_iport_check: 
	if (core_scsi3_nodeacl_depend_item(dest_node_acl)) {

		pr_err("core_scsi3_nodeacl_depend_item() for"

			" dest_node_acl\n");

		atomic_dec(&dest_node_acl->acl_pr_ref_count);

		smp_mb__after_atomic();

		atomic_dec_mb(&dest_node_acl->acl_pr_ref_count);

		dest_node_acl = NULL;

		ret = TCM_INVALID_PARAMETER_LIST;

		goto out;
@@ -3313,8 +3287,7 @@ after_iport_check: 


	if (core_scsi3_lunacl_depend_item(dest_se_deve)) {

		pr_err("core_scsi3_lunacl_depend_item() failed\n");

		atomic_dec(&dest_se_deve->pr_ref_count);

		smp_mb__after_atomic();

		atomic_dec_mb(&dest_se_deve->pr_ref_count);

		dest_se_deve = NULL;

		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;

		goto out;
@@ -3879,8 +3852,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd) 
		se_tpg = pr_reg->pr_reg_nacl->se_tpg;

		add_desc_len = 0;



		atomic_inc(&pr_reg->pr_res_holders);

		smp_mb__after_atomic();

		atomic_inc_mb(&pr_reg->pr_res_holders);

		spin_unlock(&pr_tmpl->registration_lock);

		/*

		 * Determine expected length of $FABRIC_MOD specific
@@ -3893,8 +3865,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd) 
			pr_warn("SPC-3 PRIN READ_FULL_STATUS ran"

				" out of buffer: %d\n", cmd->data_length);

			spin_lock(&pr_tmpl->registration_lock);

			atomic_dec(&pr_reg->pr_res_holders);

			smp_mb__after_atomic();

			atomic_dec_mb(&pr_reg->pr_res_holders);

			break;

		}

		/*
@@ -3955,8 +3926,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd) 
				se_nacl, pr_reg, &format_code, &buf[off+4]);



		spin_lock(&pr_tmpl->registration_lock);

		atomic_dec(&pr_reg->pr_res_holders);

		smp_mb__after_atomic();

		atomic_dec_mb(&pr_reg->pr_res_holders);

		/*

		 * Set the ADDITIONAL DESCRIPTOR LENGTH

		 */

drivers/target/target_core_transport.c

+6 −12
Original line number Diff line number Diff line
@@ -752,8 +752,7 @@ void target_qf_do_work(struct work_struct *work) 


	list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) {

		list_del(&cmd->se_qf_node);

		atomic_dec(&dev->dev_qf_count);

		smp_mb__after_atomic();

		atomic_dec_mb(&dev->dev_qf_count);



		pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue"

			" context: %s\n", cmd->se_tfo->get_fabric_name(), cmd,
@@ -1721,8 +1720,7 @@ static bool target_handle_task_attr(struct se_cmd *cmd) 
			 cmd->t_task_cdb[0], cmd->se_ordered_id);

		return false;

	case MSG_ORDERED_TAG:

		atomic_inc(&dev->dev_ordered_sync);

		smp_mb__after_atomic();

		atomic_inc_mb(&dev->dev_ordered_sync);



		pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, "

			 " se_ordered_id: %u\n",
@@ -1739,8 +1737,7 @@ static bool target_handle_task_attr(struct se_cmd *cmd) 
		/*

		 * For SIMPLE and UNTAGGED Task Attribute commands

		 */

		atomic_inc(&dev->simple_cmds);

		smp_mb__after_atomic();

		atomic_inc_mb(&dev->simple_cmds);

		break;

	}
@@ -1844,8 +1841,7 @@ static void transport_complete_task_attr(struct se_cmd *cmd) 
		return;



	if (cmd->sam_task_attr == MSG_SIMPLE_TAG) {

		atomic_dec(&dev->simple_cmds);

		smp_mb__after_atomic();

		atomic_dec_mb(&dev->simple_cmds);

		dev->dev_cur_ordered_id++;

		pr_debug("Incremented dev->dev_cur_ordered_id: %u for"

			" SIMPLE: %u\n", dev->dev_cur_ordered_id,
@@ -1856,8 +1852,7 @@ static void transport_complete_task_attr(struct se_cmd *cmd) 
			" HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id,

			cmd->se_ordered_id);

	} else if (cmd->sam_task_attr == MSG_ORDERED_TAG) {

		atomic_dec(&dev->dev_ordered_sync);

		smp_mb__after_atomic();

		atomic_dec_mb(&dev->dev_ordered_sync);



		dev->dev_cur_ordered_id++;

		pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:"
@@ -1915,8 +1910,7 @@ static void transport_handle_queue_full( 
{

	spin_lock_irq(&dev->qf_cmd_lock);

	list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list);

	atomic_inc(&dev->dev_qf_count);

	smp_mb__after_atomic();

	atomic_inc_mb(&dev->dev_qf_count);

	spin_unlock_irq(&cmd->se_dev->qf_cmd_lock);



	schedule_work(&cmd->se_dev->qf_work_queue);

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