isci: add some type safety to the state machine interface

Now that any given object type only has one state_machine we can use
container_of() to get back to the given state machine owner.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

8 files changed, 148 insertions, 194 deletions

diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index a942384f279..6cd7648197e 100644
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -1404,17 +1404,17 @@ static void isci_user_parameters_get(
 	u->max_number_concurrent_device_spin_up = max_concurr_spinup;
 }
 
-static void scic_sds_controller_initial_state_enter(void *object)
+static void scic_sds_controller_initial_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_controller *scic = object;
+	struct scic_sds_controller *scic = container_of(sm, typeof(*scic), state_machine);
 
 	sci_base_state_machine_change_state(&scic->state_machine,
 			SCI_BASE_CONTROLLER_STATE_RESET);
 }
 
-static inline void scic_sds_controller_starting_state_exit(void *object)
+static inline void scic_sds_controller_starting_state_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_controller *scic = object;
+	struct scic_sds_controller *scic = container_of(sm, typeof(*scic), state_machine);
 
 	isci_timer_stop(scic->timeout_timer);
 }
@@ -1539,17 +1539,17 @@ static enum sci_status scic_controller_set_interrupt_coalescence(
 }
 
 
-static void scic_sds_controller_ready_state_enter(void *object)
+static void scic_sds_controller_ready_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_controller *scic = object;
+	struct scic_sds_controller *scic = container_of(sm, typeof(*scic), state_machine);
 
 	/* set the default interrupt coalescence number and timeout value. */
 	scic_controller_set_interrupt_coalescence(scic, 0x10, 250);
 }
 
-static void scic_sds_controller_ready_state_exit(void *object)
+static void scic_sds_controller_ready_state_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_controller *scic = object;
+	struct scic_sds_controller *scic = container_of(sm, typeof(*scic), state_machine);
 
 	/* disable interrupt coalescence. */
 	scic_controller_set_interrupt_coalescence(scic, 0, 0);
@@ -1638,9 +1638,9 @@ static enum sci_status scic_sds_controller_stop_devices(struct scic_sds_controll
 	return status;
 }
 
-static void scic_sds_controller_stopping_state_enter(void *object)
+static void scic_sds_controller_stopping_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_controller *scic = object;
+	struct scic_sds_controller *scic = container_of(sm, typeof(*scic), state_machine);
 
 	/* Stop all of the components for this controller */
 	scic_sds_controller_stop_phys(scic);
@@ -1648,9 +1648,9 @@ static void scic_sds_controller_stopping_state_enter(void *object)
 	scic_sds_controller_stop_devices(scic);
 }
 
-static void scic_sds_controller_stopping_state_exit(void *object)
+static void scic_sds_controller_stopping_state_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_controller *scic = object;
+	struct scic_sds_controller *scic = container_of(sm, typeof(*scic), state_machine);
 
 	isci_timer_stop(scic->timeout_timer);
 }
@@ -1679,9 +1679,9 @@ static void scic_sds_controller_reset_hardware(struct scic_sds_controller *scic)
 	writel(0, &scic->scu_registers->sdma.unsolicited_frame_get_pointer);
 }
 
-static void scic_sds_controller_resetting_state_enter(void *object)
+static void scic_sds_controller_resetting_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_controller *scic = object;
+	struct scic_sds_controller *scic = container_of(sm, typeof(*scic), state_machine);
 
 	scic_sds_controller_reset_hardware(scic);
 	sci_base_state_machine_change_state(&scic->state_machine,
@@ -1785,8 +1785,8 @@ static enum sci_status scic_controller_construct(struct scic_sds_controller *sci
 	u8 i;
 
 	sci_base_state_machine_construct(&scic->state_machine,
-		scic, scic_sds_controller_state_table,
-		SCI_BASE_CONTROLLER_STATE_INITIAL);
+					 scic_sds_controller_state_table,
+					 SCI_BASE_CONTROLLER_STATE_INITIAL);
 
 	sci_base_state_machine_start(&scic->state_machine);
 
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
index 8bd1a85f621..f21e10e2888 100644
--- a/drivers/scsi/isci/phy.c
+++ b/drivers/scsi/isci/phy.c
@@ -1026,81 +1026,80 @@ enum sci_status scic_sds_phy_frame_handler(struct scic_sds_phy *sci_phy,
 	
 }
 
-static void scic_sds_phy_starting_initial_substate_enter(void *object)
+static void scic_sds_phy_starting_initial_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	/* This is just an temporary state go off to the starting state */
 	sci_base_state_machine_change_state(&sci_phy->state_machine,
 					    SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN);
 }
 
-static void scic_sds_phy_starting_await_sas_power_substate_enter(void *object)
+static void scic_sds_phy_starting_await_sas_power_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 	struct scic_sds_controller *scic = sci_phy->owning_port->owning_controller;
 
 	scic_sds_controller_power_control_queue_insert(scic, sci_phy);
 }
 
-static void scic_sds_phy_starting_await_sas_power_substate_exit(void *object)
+static void scic_sds_phy_starting_await_sas_power_substate_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 	struct scic_sds_controller *scic = sci_phy->owning_port->owning_controller;
 
 	scic_sds_controller_power_control_queue_remove(scic, sci_phy);
 }
 
-static void scic_sds_phy_starting_await_sata_power_substate_enter(void *object)
+static void scic_sds_phy_starting_await_sata_power_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 	struct scic_sds_controller *scic = sci_phy->owning_port->owning_controller;
 
 	scic_sds_controller_power_control_queue_insert(scic, sci_phy);
 }
 
-static void scic_sds_phy_starting_await_sata_power_substate_exit(void *object)
+static void scic_sds_phy_starting_await_sata_power_substate_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 	struct scic_sds_controller *scic = sci_phy->owning_port->owning_controller;
 
 	scic_sds_controller_power_control_queue_remove(scic, sci_phy);
 }
 
-static void scic_sds_phy_starting_await_sata_phy_substate_enter(void *object)
+static void scic_sds_phy_starting_await_sata_phy_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	isci_timer_start(sci_phy->sata_timeout_timer,
 			 SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT);
 }
 
-static void scic_sds_phy_starting_await_sata_phy_substate_exit(void *object)
+static void scic_sds_phy_starting_await_sata_phy_substate_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	isci_timer_stop(sci_phy->sata_timeout_timer);
 }
 
-static void scic_sds_phy_starting_await_sata_speed_substate_enter(void *object)
+static void scic_sds_phy_starting_await_sata_speed_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	isci_timer_start(sci_phy->sata_timeout_timer,
 			 SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT);
 }
 
-static void scic_sds_phy_starting_await_sata_speed_substate_exit(
-	void *object)
+static void scic_sds_phy_starting_await_sata_speed_substate_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	isci_timer_stop(sci_phy->sata_timeout_timer);
 }
 
-static void scic_sds_phy_starting_await_sig_fis_uf_substate_enter(void *object)
+static void scic_sds_phy_starting_await_sig_fis_uf_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	if (scic_sds_port_link_detected(sci_phy->owning_port, sci_phy)) {
 
@@ -1118,16 +1117,16 @@ static void scic_sds_phy_starting_await_sig_fis_uf_substate_enter(void *object)
 		sci_phy->is_in_link_training = false;
 }
 
-static void scic_sds_phy_starting_await_sig_fis_uf_substate_exit(void *object)
+static void scic_sds_phy_starting_await_sig_fis_uf_substate_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	isci_timer_stop(sci_phy->sata_timeout_timer);
 }
 
-static void scic_sds_phy_starting_final_substate_enter(void *object)
+static void scic_sds_phy_starting_final_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	/* State machine has run to completion so exit out and change
 	 * the base state machine to the ready state
@@ -1217,9 +1216,9 @@ static void scu_link_layer_tx_hard_reset(
 	       &sci_phy->link_layer_registers->phy_configuration);
 }
 
-static void scic_sds_phy_stopped_state_enter(void *object)
+static void scic_sds_phy_stopped_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 	struct scic_sds_port *sci_port = sci_phy->owning_port;
 	struct scic_sds_controller *scic = sci_port->owning_controller;
 	struct isci_host *ihost = scic_to_ihost(scic);
@@ -1242,9 +1241,9 @@ static void scic_sds_phy_stopped_state_enter(void *object)
 					      sci_phy);
 }
 
-static void scic_sds_phy_starting_state_enter(void *object)
+static void scic_sds_phy_starting_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	scu_link_layer_stop_protocol_engine(sci_phy);
 	scu_link_layer_start_oob(sci_phy);
@@ -1262,9 +1261,9 @@ static void scic_sds_phy_starting_state_enter(void *object)
 					    SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL);
 }
 
-static void scic_sds_phy_ready_state_enter(void *object)
+static void scic_sds_phy_ready_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	scic_sds_controller_link_up(scic_sds_phy_get_controller(sci_phy),
 				    phy_get_non_dummy_port(sci_phy),
@@ -1272,16 +1271,16 @@ static void scic_sds_phy_ready_state_enter(void *object)
 
 }
 
-static void scic_sds_phy_ready_state_exit(void *object)
+static void scic_sds_phy_ready_state_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	scic_sds_phy_suspend(sci_phy);
 }
 
-static void scic_sds_phy_resetting_state_enter(void *object)
+static void scic_sds_phy_resetting_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_phy *sci_phy = object;
+	struct scic_sds_phy *sci_phy = container_of(sm, typeof(*sci_phy), state_machine);
 
 	/* The phy is being reset, therefore deactivate it from the port.  In
 	 * the resetting state we don't notify the user regarding link up and
@@ -1351,7 +1350,6 @@ void scic_sds_phy_construct(struct scic_sds_phy *sci_phy,
 			    struct scic_sds_port *owning_port, u8 phy_index)
 {
 	sci_base_state_machine_construct(&sci_phy->state_machine,
-					 sci_phy,
 					 scic_sds_phy_state_table,
 					 SCI_BASE_PHY_STATE_INITIAL);
 
diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c
index f43c1f6c966..3050415e228 100644
--- a/drivers/scsi/isci/port.c
+++ b/drivers/scsi/isci/port.c
@@ -1133,9 +1133,9 @@ scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port)
 	writel(pts_control_value, &port->port_task_scheduler_registers->control);
 }
 
-static void scic_sds_port_ready_substate_waiting_enter(void *object)
+static void scic_sds_port_ready_substate_waiting_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 
 	scic_sds_port_suspend_port_task_scheduler(sci_port);
 
@@ -1148,10 +1148,10 @@ static void scic_sds_port_ready_substate_waiting_enter(void *object)
 	}
 }
 
-static void scic_sds_port_ready_substate_operational_enter(void *object)
+static void scic_sds_port_ready_substate_operational_enter(struct sci_base_state_machine *sm)
 {
 	u32 index;
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 	struct scic_sds_controller *scic = sci_port->owning_controller;
 	struct isci_host *ihost = scic_to_ihost(scic);
 	struct isci_port *iport = sci_port_to_iport(sci_port);
@@ -1210,9 +1210,9 @@ static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci
  * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
  * the port not ready and suspends the port task scheduler. none
  */
-static void scic_sds_port_ready_substate_operational_exit(void *object)
+static void scic_sds_port_ready_substate_operational_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 	struct scic_sds_controller *scic = sci_port->owning_controller;
 	struct isci_host *ihost = scic_to_ihost(scic);
 	struct isci_port *iport = sci_port_to_iport(sci_port);
@@ -1230,9 +1230,9 @@ static void scic_sds_port_ready_substate_operational_exit(void *object)
 		scic_sds_port_invalidate_dummy_remote_node(sci_port);
 }
 
-static void scic_sds_port_ready_substate_configuring_enter(void *object)
+static void scic_sds_port_ready_substate_configuring_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 	struct scic_sds_controller *scic = sci_port->owning_controller;
 	struct isci_host *ihost = scic_to_ihost(scic);
 	struct isci_port *iport = sci_port_to_iport(sci_port);
@@ -1247,9 +1247,9 @@ static void scic_sds_port_ready_substate_configuring_enter(void *object)
 					  SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
 }
 
-static void scic_sds_port_ready_substate_configuring_exit(void *object)
+static void scic_sds_port_ready_substate_configuring_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 
 	scic_sds_port_suspend_port_task_scheduler(sci_port);
 	if (sci_port->ready_exit)
@@ -1710,9 +1710,9 @@ static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port)
 	scic_sds_controller_post_request(scic, command);
 }
 
-static void scic_sds_port_stopped_state_enter(void *object)
+static void scic_sds_port_stopped_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 
 	if (sci_port->state_machine.previous_state_id == SCI_BASE_PORT_STATE_STOPPING) {
 		/*
@@ -1723,17 +1723,17 @@ static void scic_sds_port_stopped_state_enter(void *object)
 	}
 }
 
-static void scic_sds_port_stopped_state_exit(void *object)
+static void scic_sds_port_stopped_state_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 
 	/* Enable and suspend the port task scheduler */
 	scic_sds_port_enable_port_task_scheduler(sci_port);
 }
 
-static void scic_sds_port_ready_state_enter(void *object)
+static void scic_sds_port_ready_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 	struct scic_sds_controller *scic = sci_port->owning_controller;
 	struct isci_host *ihost = scic_to_ihost(scic);
 	struct isci_port *iport = sci_port_to_iport(sci_port);
@@ -1753,25 +1753,25 @@ static void scic_sds_port_ready_state_enter(void *object)
 				  SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
 }
 
-static void scic_sds_port_resetting_state_exit(void *object)
+static void scic_sds_port_resetting_state_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 
 	isci_timer_stop(sci_port->timer_handle);
 }
 
-static void scic_sds_port_stopping_state_exit(void *object)
+static void scic_sds_port_stopping_state_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 
 	isci_timer_stop(sci_port->timer_handle);
 
 	scic_sds_port_destroy_dummy_resources(sci_port);
 }
 
-static void scic_sds_port_failed_state_enter(void *object)
+static void scic_sds_port_failed_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_port *sci_port = object;
+	struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), state_machine);
 	struct isci_port *iport = sci_port_to_iport(sci_port);
 
 	isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT);
@@ -1813,7 +1813,6 @@ void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index,
 			     struct scic_sds_controller *scic)
 {
 	sci_base_state_machine_construct(&sci_port->state_machine,
-					 sci_port,
 					 scic_sds_port_state_table,
 					 SCI_BASE_PORT_STATE_STOPPED);
 
diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index b900e2c1b63..68b63b04be1 100644
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -807,9 +807,9 @@ static void scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handl
 		isci_remote_device_ready(scic_to_ihost(scic), idev);
 }
 
-static void scic_sds_remote_device_initial_state_enter(void *object)
+static void scic_sds_remote_device_initial_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 
 	/* Initial state is a transitional state to the stopped state */
 	sci_base_state_machine_change_state(&sci_dev->state_machine,
@@ -904,9 +904,9 @@ static void isci_remote_device_stop_complete(struct isci_host *ihost,
 	isci_remote_device_deconstruct(ihost, idev);
 }
 
-static void scic_sds_remote_device_stopped_state_enter(void *object)
+static void scic_sds_remote_device_stopped_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 	struct scic_sds_controller *scic = sci_dev->owning_port->owning_controller;
 	struct isci_remote_device *idev = sci_dev_to_idev(sci_dev);
 	u32 prev_state;
@@ -921,9 +921,9 @@ static void scic_sds_remote_device_stopped_state_enter(void *object)
 	scic_sds_controller_remote_device_stopped(scic, sci_dev);
 }
 
-static void scic_sds_remote_device_starting_state_enter(void *object)
+static void scic_sds_remote_device_starting_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 	struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
 	struct isci_host *ihost = scic_to_ihost(scic);
 	struct isci_remote_device *idev = sci_dev_to_idev(sci_dev);
@@ -932,9 +932,9 @@ static void scic_sds_remote_device_starting_state_enter(void *object)
 				     SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED);
 }
 
-static void scic_sds_remote_device_ready_state_enter(void *object)
+static void scic_sds_remote_device_ready_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 	struct scic_sds_controller *scic = sci_dev->owning_port->owning_controller;
 	struct isci_remote_device *idev = sci_dev_to_idev(sci_dev);
 	struct domain_device *dev = idev->domain_dev;
@@ -951,9 +951,9 @@ static void scic_sds_remote_device_ready_state_enter(void *object)
 		isci_remote_device_ready(scic_to_ihost(scic), idev);
 }
 
-static void scic_sds_remote_device_ready_state_exit(void *object)
+static void scic_sds_remote_device_ready_state_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 	struct domain_device *dev = sci_dev_to_domain(sci_dev);
 
 	if (dev->dev_type == SAS_END_DEV) {
@@ -965,24 +965,24 @@ static void scic_sds_remote_device_ready_state_exit(void *object)
 	}
 }
 
-static void scic_sds_remote_device_resetting_state_enter(void *object)
+static void scic_sds_remote_device_resetting_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 
 	scic_sds_remote_node_context_suspend(
 		&sci_dev->rnc, SCI_SOFTWARE_SUSPENSION, NULL, NULL);
 }
 
-static void scic_sds_remote_device_resetting_state_exit(void *object)
+static void scic_sds_remote_device_resetting_state_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 
 	scic_sds_remote_node_context_resume(&sci_dev->rnc, NULL, NULL);
 }
 
-static void scic_sds_stp_remote_device_ready_idle_substate_enter(void *object)
+static void scic_sds_stp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 
 	sci_dev->working_request = NULL;
 	if (scic_sds_remote_node_context_is_ready(&sci_dev->rnc)) {
@@ -997,9 +997,9 @@ static void scic_sds_stp_remote_device_ready_idle_substate_enter(void *object)
 	}
 }
 
-static void scic_sds_stp_remote_device_ready_cmd_substate_enter(void *object)
+static void scic_sds_stp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 	struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
 
 	BUG_ON(sci_dev->working_request == NULL);
@@ -1008,9 +1008,9 @@ static void scic_sds_stp_remote_device_ready_cmd_substate_enter(void *object)
 				     SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED);
 }
 
-static void scic_sds_stp_remote_device_ready_ncq_error_substate_enter(void *object)
+static void scic_sds_stp_remote_device_ready_ncq_error_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 	struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
 	struct isci_remote_device *idev = sci_dev_to_idev(sci_dev);
 
@@ -1019,17 +1019,17 @@ static void scic_sds_stp_remote_device_ready_ncq_error_substate_enter(void *obje
 					     sci_dev->not_ready_reason);
 }
 
-static void scic_sds_smp_remote_device_ready_idle_substate_enter(void *object)
+static void scic_sds_smp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 	struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
 
 	isci_remote_device_ready(scic_to_ihost(scic), sci_dev_to_idev(sci_dev));
 }
 
-static void scic_sds_smp_remote_device_ready_cmd_substate_enter(void *object)
+static void scic_sds_smp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 	struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
 
 	BUG_ON(sci_dev->working_request == NULL);
@@ -1038,9 +1038,9 @@ static void scic_sds_smp_remote_device_ready_cmd_substate_enter(void *object)
 				     SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED);
 }
 
-static void scic_sds_smp_remote_device_ready_cmd_substate_exit(void *object)
+static void scic_sds_smp_remote_device_ready_cmd_substate_exit(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_device *sci_dev = object;
+	struct scic_sds_remote_device *sci_dev = container_of(sm, typeof(*sci_dev), state_machine);
 
 	sci_dev->working_request = NULL;
 }
@@ -1102,16 +1102,11 @@ static void scic_remote_device_construct(struct scic_sds_port *sci_port,
 	sci_dev->owning_port = sci_port;
 	sci_dev->started_request_count = 0;
 
-	sci_base_state_machine_construct(
-		&sci_dev->state_machine,
-		sci_dev,
-		scic_sds_remote_device_state_table,
-		SCI_BASE_REMOTE_DEVICE_STATE_INITIAL
-		);
+	sci_base_state_machine_construct(&sci_dev->state_machine,
+					 scic_sds_remote_device_state_table,
+					 SCI_BASE_REMOTE_DEVICE_STATE_INITIAL);
 
-	sci_base_state_machine_start(
-		&sci_dev->state_machine
-		);
+	sci_base_state_machine_start(&sci_dev->state_machine);
 
 	scic_sds_remote_node_context_construct(&sci_dev->rnc,
 					       SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX);
diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c
index 82507bd228d..e7fa5bac7d5 100644
--- a/drivers/scsi/isci/remote_node_context.c
+++ b/drivers/scsi/isci/remote_node_context.c
@@ -266,10 +266,9 @@ static void scic_sds_remote_node_context_invalidate_context_buffer(
 					    SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE);
 }
 
-static void scic_sds_remote_node_context_initial_state_enter(void *object)
+static void scic_sds_remote_node_context_initial_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_node_context *rnc = object;
-	struct sci_base_state_machine *sm = &rnc->state_machine;
+	struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), state_machine);
 
 	/* Check to see if we have gotten back to the initial state because
 	 * someone requested to destroy the remote node context object.
@@ -280,23 +279,23 @@ static void scic_sds_remote_node_context_initial_state_enter(void *object)
 	}
 }
 
-static void scic_sds_remote_node_context_posting_state_enter(void *object)
+static void scic_sds_remote_node_context_posting_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_node_context *sci_rnc = object;
+	struct scic_sds_remote_node_context *sci_rnc = container_of(sm, typeof(*sci_rnc), state_machine);
 
 	scic_sds_remote_node_context_validate_context_buffer(sci_rnc);
 }
 
-static void scic_sds_remote_node_context_invalidating_state_enter(void *object)
+static void scic_sds_remote_node_context_invalidating_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_node_context *rnc = object;
+	struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), state_machine);
 
 	scic_sds_remote_node_context_invalidate_context_buffer(rnc);
 }
 
-static void scic_sds_remote_node_context_resuming_state_enter(void *object)
+static void scic_sds_remote_node_context_resuming_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_node_context *rnc = object;
+	struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), state_machine);
 	struct scic_sds_remote_device *sci_dev;
 	struct domain_device *dev;
 
@@ -317,9 +316,9 @@ static void scic_sds_remote_node_context_resuming_state_enter(void *object)
 	scic_sds_remote_device_post_request(sci_dev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME);
 }
 
-static void scic_sds_remote_node_context_ready_state_enter(void *object)
+static void scic_sds_remote_node_context_ready_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_node_context *rnc = object;
+	struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), state_machine);
 
 	rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED;
 
@@ -327,17 +326,16 @@ static void scic_sds_remote_node_context_ready_state_enter(void *object)
 		scic_sds_remote_node_context_notify_user(rnc);
 }
 
-static void scic_sds_remote_node_context_tx_suspended_state_enter(void *object)
+static void scic_sds_remote_node_context_tx_suspended_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_node_context *rnc = object;
+	struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), state_machine);
 
 	scic_sds_remote_node_context_continue_state_transitions(rnc);
 }
 
-static void scic_sds_remote_node_context_tx_rx_suspended_state_enter(
-		void *object)
+static void scic_sds_remote_node_context_tx_rx_suspended_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_remote_node_context *rnc = object;
+	struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), state_machine);
 
 	scic_sds_remote_node_context_continue_state_transitions(rnc);
 }
@@ -375,12 +373,9 @@ void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context
 	rnc->remote_node_index = remote_node_index;
 	rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED;
 
-	sci_base_state_machine_construct(
-		&rnc->state_machine,
-		rnc,
-		scic_sds_remote_node_context_state_table,
-		SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE
-		);
+	sci_base_state_machine_construct(&rnc->state_machine,
+					 scic_sds_remote_node_context_state_table,
+					 SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE);
 
 	sci_base_state_machine_start(&rnc->state_machine);
 }
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index c63064ede38..063ef04080d 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -2900,10 +2900,9 @@ static void isci_request_io_request_complete(struct isci_host *isci_host,
 	isci_host_can_dequeue(isci_host, 1);
 }
 
-static void scic_sds_request_started_state_enter(void *object)
+static void scic_sds_request_started_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_request *sci_req = object;
-	struct sci_base_state_machine *sm = &sci_req->state_machine;
+	struct scic_sds_request *sci_req = container_of(sm, typeof(*sci_req), state_machine);
 	struct isci_request *ireq = sci_req_to_ireq(sci_req);
 	struct domain_device *dev = sci_dev_to_domain(sci_req->target_device);
 	struct sas_task *task;
@@ -2942,9 +2941,9 @@ static void scic_sds_request_started_state_enter(void *object)
 	}
 }
 
-static void scic_sds_request_completed_state_enter(void *object)
+static void scic_sds_request_completed_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_request *sci_req = object;
+	struct scic_sds_request *sci_req = container_of(sm, typeof(*sci_req), state_machine);
 	struct scic_sds_controller *scic = sci_req->owning_controller;
 	struct isci_host *ihost = scic_to_ihost(scic);
 	struct isci_request *ireq = sci_req_to_ireq(sci_req);
@@ -2957,42 +2956,41 @@ static void scic_sds_request_completed_state_enter(void *object)
 		isci_task_request_complete(ihost, ireq, sci_req->sci_status);
 }
 
-static void scic_sds_request_aborting_state_enter(void *object)
+static void scic_sds_request_aborting_state_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_request *sci_req = object;
+	struct scic_sds_request *sci_req = container_of(sm, typeof(*sci_req), state_machine);
 
 	/* Setting the abort bit in the Task Context is required by the silicon. */
 	sci_req->task_context_buffer->abort = 1;
 }
 
-static void scic_sds_stp_request_started_non_data_await_h2d_completion_enter(
-	void *object)
+static void scic_sds_stp_request_started_non_data_await_h2d_completion_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_request *sci_req = object;
+	struct scic_sds_request *sci_req = container_of(sm, typeof(*sci_req), state_machine);
 
 	scic_sds_remote_device_set_working_request(sci_req->target_device,
 						   sci_req);
 }
 
-static void scic_sds_stp_request_started_pio_await_h2d_completion_enter(void *object)
+static void scic_sds_stp_request_started_pio_await_h2d_completion_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_request *sci_req = object;
+	struct scic_sds_request *sci_req = container_of(sm, typeof(*sci_req), state_machine);
 
 	scic_sds_remote_device_set_working_request(sci_req->target_device,
 						   sci_req);
 }
 
-static void scic_sds_stp_request_started_soft_reset_await_h2d_asserted_completion_enter(void *object)
+static void scic_sds_stp_request_started_soft_reset_await_h2d_asserted_completion_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_request *sci_req = object;
+	struct scic_sds_request *sci_req = container_of(sm, typeof(*sci_req), state_machine);
 
 	scic_sds_remote_device_set_working_request(sci_req->target_device,
 						   sci_req);
 }
 
-static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter(void *object)
+static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter(struct sci_base_state_machine *sm)
 {
-	struct scic_sds_request *sci_req = object;
+	struct scic_sds_request *sci_req = container_of(sm, typeof(*sci_req), state_machine);
 	struct scu_task_context *task_context;
 	struct host_to_dev_fis *h2d_fis;
 	enum sci_status status;
@@ -3052,8 +3050,9 @@ static void scic_sds_general_request_construct(struct scic_sds_controller *scic,
 					       struct scic_sds_remote_device *sci_dev,
 					       u16 io_tag, struct scic_sds_request *sci_req)
 {
-	sci_base_state_machine_construct(&sci_req->state_machine, sci_req,
-			scic_sds_request_state_table, SCI_BASE_REQUEST_STATE_INITIAL);
+	sci_base_state_machine_construct(&sci_req->state_machine,
+					 scic_sds_request_state_table,
+					 SCI_BASE_REQUEST_STATE_INITIAL);
 	sci_base_state_machine_start(&sci_req->state_machine);
 
 	sci_req->io_tag = io_tag;
diff --git a/drivers/scsi/isci/state_machine.c b/drivers/scsi/isci/state_machine.c
index 6057782af8c..1bcd925e502 100644
--- a/drivers/scsi/isci/state_machine.c
+++ b/drivers/scsi/isci/state_machine.c
@@ -68,7 +68,7 @@ static void sci_state_machine_exit_state(struct sci_base_state_machine *sm)
 	sci_state_transition_t exit = sm->state_table[state].exit_state;
 
 	if (exit)
-		exit(sm->state_machine_owner);
+		exit(sm);
 }
 
 static void sci_state_machine_enter_state(struct sci_base_state_machine *sm)
@@ -77,22 +77,15 @@ static void sci_state_machine_enter_state(struct sci_base_state_machine *sm)
 	sci_state_transition_t enter = sm->state_table[state].enter_state;
 
 	if (enter)
-		enter(sm->state_machine_owner);
+		enter(sm);
 }
 
-/*
- * ******************************************************************************
- * * P R O T E C T E D    M E T H O D S
- * ****************************************************************************** */
-
 /**
  * This method will set the initial state and state table for the state
  *    machine. The caller should follow this request with the initialize
  *    request to cause the state machine to start.
  * @sm: This parameter provides the state machine object to be
  *    constructed.
- * @state_machine_owner: This parameter indicates the object that is owns the
- *    state machine being constructed.
  * @state_table: This parameter specifies the table of state objects that is
  *    managed by this state machine.
  * @initial_state: This parameter specifies the value of the initial state for
@@ -100,11 +93,9 @@ static void sci_state_machine_enter_state(struct sci_base_state_machine *sm)
  *
  */
 void sci_base_state_machine_construct(struct sci_base_state_machine *sm,
-				      void *owner,
 				      const struct sci_base_state *state_table,
 				      u32 initial_state)
 {
-	sm->state_machine_owner = owner;
 	sm->initial_state_id    = initial_state;
 	sm->previous_state_id   = initial_state;
 	sm->current_state_id    = initial_state;
diff --git a/drivers/scsi/isci/state_machine.h b/drivers/scsi/isci/state_machine.h
index 60ef1cf5abf..067ed9126bf 100644
--- a/drivers/scsi/isci/state_machine.h
+++ b/drivers/scsi/isci/state_machine.h
@@ -58,9 +58,9 @@
 
 #include <linux/types.h>
 
+struct sci_base_state_machine;
 typedef void (*sci_base_state_handler_t)(void);
-
-typedef void (*sci_state_transition_t)(void *base_object);
+typedef void (*sci_state_transition_t)(struct sci_base_state_machine *sm);
 
 /**
  * struct sci_base_state - The base state object abstracts the fields common to
@@ -80,7 +80,6 @@ struct sci_base_state {
 	 * invoked when the state is exited.
 	 */
 	sci_state_transition_t exit_state;
-
 };
 
 /**
@@ -96,13 +95,6 @@ struct sci_base_state_machine {
 	const struct sci_base_state *state_table;
 
 	/**
-	 * This field points to the object to which this state machine is
-	 * associated.  It serves as a cookie to be provided to the state
-	 * enter/exit methods.
-	 */
-	void *state_machine_owner;
-
-	/**
 	 * This field simply indicates the state value for the state machine's
 	 * initial state.
 	 */
@@ -120,28 +112,13 @@ struct sci_base_state_machine {
 
 };
 
-/*
- * ******************************************************************************
- * * P R O T E C T E D    M E T H O D S
- * ****************************************************************************** */
-
-void sci_base_state_machine_construct(
-	struct sci_base_state_machine *this_state_machine,
-	void *state_machine_owner,
-	const struct sci_base_state *state_table,
-	u32 initial_state);
-
-void sci_base_state_machine_start(
-	struct sci_base_state_machine *this_state_machine);
-
-void sci_base_state_machine_stop(
-	struct sci_base_state_machine *this_state_machine);
-
-void sci_base_state_machine_change_state(
-	struct sci_base_state_machine *this_state_machine,
-	u32 next_state);
-
-u32 sci_base_state_machine_get_state(
-	struct sci_base_state_machine *this_state_machine);
+void sci_base_state_machine_construct(struct sci_base_state_machine *sm,
+				      const struct sci_base_state *state_table,
+				      u32 initial_state);
+void sci_base_state_machine_start(struct sci_base_state_machine *sm);
+void sci_base_state_machine_stop(struct sci_base_state_machine *sm);
+void sci_base_state_machine_change_state(struct sci_base_state_machine *sm,
+					 u32 next_state);
+u32 sci_base_state_machine_get_state(struct sci_base_state_machine *sm);
 
 #endif /* _SCI_BASE_STATE_MACHINE_H_ */