PCI: pciehp: remove first_slot field

The slot number can be calculated only by physical slot number field
in the slot capabilities register. So the first_slot field in struct
controller is meaningless and we don't need it.
Acked-by: NAlex Chiang <achiang@hp.com>
Signed-off-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/hotplug/pciehp.h

@@ -95,7 +95,6 @@ struct controller {
 	struct slot *slot;
 	struct hpc_ops *hpc_ops;
 	wait_queue_head_t queue;	/* sleep & wake process */
-	u32 first_slot;		/* First physical slot number */  /* PCIE only has 1 slot */
 	u8 slot_bus;		/* Bus where the slots handled by this controller sit */
 	u32 slot_cap;
 	u8 cap_base;
@@ -153,6 +152,7 @@ struct controller {
 #define HP_SUPR_RM(ctrl)	((ctrl)->slot_cap & HP_SUPR_RM_SUP)
 #define EMI(ctrl)		((ctrl)->slot_cap & EMI_PRSN)
 #define NO_CMD_CMPL(ctrl)	((ctrl)->slot_cap & NO_CMD_CMPL_SUP)
+#define PSN(ctrl)		((ctrl)->slot_cap >> 19)
 
 extern int pciehp_sysfs_enable_slot(struct slot *slot);
 extern int pciehp_sysfs_disable_slot(struct slot *slot);

drivers/pci/hotplug/pciehp_hpc.c

@@ -926,7 +926,7 @@ static int pcie_init_slot(struct controller *ctrl)
 
 	slot->ctrl = ctrl;
 	slot->hpc_ops = ctrl->hpc_ops;
-	slot->number = ctrl->first_slot;
+	slot->number = PSN(ctrl);
 	mutex_init(&slot->lock);
 	INIT_DELAYED_WORK(&slot->work, pciehp_queue_pushbutton_work);
 	ctrl->slot = slot;
@@ -969,7 +969,7 @@ static inline void dbg_ctrl(struct controller *ctrl)
 			  (unsigned long long)pci_resource_start(pdev, i));
 	}
 	ctrl_info(ctrl, "Slot Capabilities      : 0x%08x\n", ctrl->slot_cap);
-	ctrl_info(ctrl, "  Physical Slot Number : %d\n", ctrl->first_slot);
+	ctrl_info(ctrl, "  Physical Slot Number : %d\n", PSN(ctrl));
 	ctrl_info(ctrl, "  Attention Button     : %3s\n",
 		  ATTN_BUTTN(ctrl) ? "yes" : "no");
 	ctrl_info(ctrl, "  Power Controller     : %3s\n",
@@ -1016,7 +1016,6 @@ struct controller *pcie_init(struct pcie_device *dev)
 	}
 
 	ctrl->slot_cap = slot_cap;
-	ctrl->first_slot = slot_cap >> 19;
 	ctrl->hpc_ops = &pciehp_hpc_ops;
 	mutex_init(&ctrl->crit_sect);
 	mutex_init(&ctrl->ctrl_lock);