scsi: be2iscsi: Add FUNCTION_RESET during driver unload

Driver unload should call COMMON_FUNCTION_RESET. For TPE feature, this
ensures that FW has knowledge about driver getting unloaded and can
reset its bit vector.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/be2iscsi/be_cmds.c

@@ -1595,7 +1595,7 @@ int beiscsi_check_fw_rdy(struct beiscsi_hba *phba)
 	return rdy;
 }
 
-static int beiscsi_cmd_function_reset(struct beiscsi_hba  *phba)
+int beiscsi_cmd_function_reset(struct beiscsi_hba *phba)
 {
 	struct be_ctrl_info *ctrl = &phba->ctrl;
 	struct be_mcc_wrb *wrb = wrb_from_mbox(&ctrl->mbox_mem);

drivers/scsi/be2iscsi/be_cmds.h

@@ -762,6 +762,8 @@ struct be_cmd_set_features {
 	} param;
 } __packed;
 
+int beiscsi_cmd_function_reset(struct beiscsi_hba *phba);
+
 int beiscsi_cmd_special_wrb(struct be_ctrl_info *ctrl, u32 load);
 
 int beiscsi_check_fw_rdy(struct beiscsi_hba *phba);

drivers/scsi/be2iscsi/be_main.c

@@ -3771,9 +3771,12 @@ static void hwi_cleanup_port(struct beiscsi_hba *phba)
 			beiscsi_cmd_q_destroy(ctrl, q, QTYPE_EQ);
 		}
 	}
+	/* this ensures complete FW cleanup */
+	beiscsi_cmd_function_reset(phba);
 	/* last communication, indicate driver is unloading */
 	beiscsi_cmd_special_wrb(&phba->ctrl, 0);
 }
+
 static int hwi_init_port(struct beiscsi_hba *phba)
 {
 	struct hwi_controller *phwi_ctrlr;