isci: sparse warnings cleanup

Clean warnings and errors reported by sparse tool.

request.c:430:50: warning: mixing different enum types
remote_device.c:534:39: warning: symbol 'flags' shadows an earlier one
task.c:495:44: warning: mixing different enum types
scic_sds_controller.c:2155:24: warning: mixing different enum types
scic_sds_controller.c:2272:36: warning: mixing different enum types
scic_sds_controller.c:2911:38: warning: incorrect type in initializer (different address spaces)
scic_sds_controller.c:2913:25: warning: incorrect type in argument 2 (different address spaces)
scic_sds_request.c:875:34: warning: cast removes address space of expression
scic_sds_request.c:876:123: warning: incorrect type in argument 2 (different address spaces)
scic_sds_port.c:585:51: warning: incorrect type in assignment (different address spaces)
scic_sds_port.c:712:9: warning: incorrect type in argument 2 (different address spaces)
scic_sds_port.c:1770:25: warning: incorrect type in argument 2 (different address spaces)

Signed-off-by: Bartosz Barcinski <Bartosz.Barcinski@intel.com>
Signed-off-by: Maciej Patelczyk <maciej.patelczyk@intel.com>
[fixed up some false positives and misconversions]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/scsi/isci/core/scic_controller.h

@@ -98,7 +98,7 @@ enum sci_status scic_controller_stop(
 enum sci_status scic_controller_reset(
 	struct scic_sds_controller *controller);
 
-enum sci_io_status scic_controller_start_io(
+enum sci_status scic_controller_start_io(
 	struct scic_sds_controller *controller,
 	struct scic_sds_remote_device *remote_device,
 	struct scic_sds_request *io_request,

drivers/scsi/isci/core/scic_sds_controller.c

@@ -1967,10 +1967,10 @@ enum sci_status scic_controller_reset(
  * requirement for the user to call scic_stp_io_set_ncq_tag() prior to invoking
  * the scic_controller_start_io() method. scic_controller_allocate_tag() for
  * more information on allocating a tag. Indicate if the controller
- * successfully started the IO request. SCI_IO_SUCCESS if the IO request was
+ * successfully started the IO request. SCI_SUCCESS if the IO request was
  * successfully started. Determine the failure situations and return values.
  */
-enum sci_io_status scic_controller_start_io(
+enum sci_status scic_controller_start_io(
 	struct scic_sds_controller *scic,
 	struct scic_sds_remote_device *rdev,
 	struct scic_sds_request *req,
@@ -2723,8 +2723,8 @@ enum sci_status scic_controller_initialize(
 		 * logical ports
 		 */
 		for (index = 0; index < max_supported_ports; index++) {
-			struct scu_port_task_scheduler_group_registers *ptsg =
-				&scic->scu_registers->peg0.ptsg;
+			struct scu_port_task_scheduler_group_registers __iomem
+				*ptsg = &scic->scu_registers->peg0.ptsg;
 
 			writel(index, &ptsg->protocol_engine[index]);
 		}

drivers/scsi/isci/core/scic_sds_port.h

@@ -250,7 +250,7 @@ struct scic_sds_port {
 	 * task scheduler group PE configuration registers.
 	 * It is used to assign PEs to a port.
 	 */
-	u32 *port_pe_configuration_register;
+	u32 __iomem *port_pe_configuration_register;
 
 	/**
 	 * This field is the VIIT register space for ths port object.

drivers/scsi/isci/core/scic_sds_request.c

@@ -850,19 +850,20 @@ void *scic_io_request_get_response_iu_address(
 u32 scic_io_request_get_number_of_bytes_transferred(
 	struct scic_sds_request *scic_sds_request)
 {
+	struct scic_sds_controller *scic = scic_sds_request->owning_controller;
 	u32 ret_val = 0;
 
-	if (readl(&scic_sds_request->owning_controller->smu_registers->address_modifier) == 0) {
+	if (readl(&scic->smu_registers->address_modifier) == 0) {
+		void __iomem *scu_reg_base = scic->scu_registers;
 		/*
 		 * get the bytes of data from the Address == BAR1 + 20002Ch + (256*TCi) where
 		 *   BAR1 is the scu_registers
 		 *   0x20002C = 0x200000 + 0x2c
 		 *            = start of task context SRAM + offset of (type.ssp.data_offset)
 		 *   TCi is the io_tag of struct scic_sds_request */
-		ret_val = readl((u8 *)scic_sds_request->owning_controller->scu_registers +
-				(SCU_TASK_CONTEXT_SRAM + SCI_FIELD_OFFSET(struct scu_task_context, type.ssp.data_offset)) +
-				((sizeof(struct scu_task_context)) * scic_sds_io_tag_get_index(scic_sds_request->io_tag))
-			);
+		ret_val = readl(scu_reg_base +
+				(SCU_TASK_CONTEXT_SRAM + offsetof(struct scu_task_context, type.ssp.data_offset)) +
+				((sizeof(struct scu_task_context)) * scic_sds_io_tag_get_index(scic_sds_request->io_tag)));
 	}
 
 	return ret_val;

drivers/scsi/isci/remote_device.c

@@ -513,15 +513,13 @@ bool isci_device_is_reset_pending(
 			__func__, isci_device, isci_request);
 
 		if (isci_request->ttype == io_task) {
-
-			unsigned long flags;
 			struct sas_task *task = isci_request_access_task(
 				isci_request);
 
-			spin_lock_irqsave(&task->task_state_lock, flags);
+			spin_lock(&task->task_state_lock);
 			if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET)
 				reset_is_pending = true;
-			spin_unlock_irqrestore(&task->task_state_lock, flags);
+			spin_unlock(&task->task_state_lock);
 		}
 	}
 

drivers/scsi/isci/task.c

@@ -429,7 +429,7 @@ int isci_task_execute_tmf(
 	unsigned long timeout_ms)
 {
 	DECLARE_COMPLETION_ONSTACK(completion);
-	enum sci_status status = SCI_FAILURE;
+	enum sci_task_status status = SCI_TASK_FAILURE;
 	struct scic_sds_remote_device *sci_device;
 	struct isci_remote_device *isci_device = tmf->device;
 	struct isci_request *request;
@@ -488,7 +488,7 @@ int isci_task_execute_tmf(
 		SCI_CONTROLLER_INVALID_IO_TAG
 		);
 
-	if (status != SCI_SUCCESS) {
+	if (status != SCI_TASK_SUCCESS) {
 		dev_warn(&isci_host->pdev->dev,
 			 "%s: start_io failed - status = 0x%x, request = %p\n",
 			 __func__,