pciehp: Fix wrong slot capability check

Current pciehp saves only 8bits of Slot Capability registers in
ctrl->ctrlcap. But it refers more than 8bit for checking EMI capability.
It is clearly a bug and EMI would never work. To fix this problem,
this patch saves full Slot Capability contens in ctrl->slot_cap. It also
reduce the redundant reads of Slot Capability register. And this pach
also cleans up the macros to check the slot capabilitys (e.g. MRL_SENS(),
and so on).

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/hotplug/pciehp.h

@@ -93,7 +93,7 @@ struct controller {
 	u8 slot_device_offset;
 	u32 first_slot;		/* First physical slot number */  /* PCIE only has 1 slot */
 	u8 slot_bus;		/* Bus where the slots handled by this controller sit */
-	u8 ctrlcap;
+	u32 slot_cap;
 	u8 cap_base;
 	struct timer_list poll_timer;
 	volatile int cmd_busy;
@@ -136,13 +136,13 @@ struct controller {
 #define HP_SUPR_RM_SUP	0x00000020
 #define EMI_PRSN	0x00020000
 
-#define ATTN_BUTTN(cap)		(cap & ATTN_BUTTN_PRSN)
-#define POWER_CTRL(cap)		(cap & PWR_CTRL_PRSN)
-#define MRL_SENS(cap)		(cap & MRL_SENS_PRSN)
-#define ATTN_LED(cap)		(cap & ATTN_LED_PRSN)
-#define PWR_LED(cap)		(cap & PWR_LED_PRSN) 
-#define HP_SUPR_RM(cap)		(cap & HP_SUPR_RM_SUP)
-#define EMI(cap)		(cap & EMI_PRSN)
+#define ATTN_BUTTN(ctrl)	((ctrl)->slot_cap & ATTN_BUTTN_PRSN)
+#define POWER_CTRL(ctrl)	((ctrl)->slot_cap & PWR_CTRL_PRSN)
+#define MRL_SENS(ctrl)		((ctrl)->slot_cap & MRL_SENS_PRSN)
+#define ATTN_LED(ctrl)		((ctrl)->slot_cap & ATTN_LED_PRSN)
+#define PWR_LED(ctrl)		((ctrl)->slot_cap & PWR_LED_PRSN)
+#define HP_SUPR_RM(ctrl)	((ctrl)->slot_cap & HP_SUPR_RM_SUP)
+#define EMI(ctrl)		((ctrl)->slot_cap & EMI_PRSN)
 
 extern int pciehp_sysfs_enable_slot(struct slot *slot);
 extern int pciehp_sysfs_disable_slot(struct slot *slot);

drivers/pci/hotplug/pciehp_core.c

@@ -258,7 +258,7 @@ static int init_slots(struct controller *ctrl)
 			goto error_info;
 		}
 		/* create additional sysfs entries */
-		if (EMI(ctrl->ctrlcap)) {
+		if (EMI(ctrl)) {
 			retval = sysfs_create_file(&hotplug_slot->kobj,
 				&hotplug_slot_attr_lock.attr);
 			if (retval) {
@@ -291,7 +291,7 @@ static void cleanup_slots(struct controller *ctrl)
 	list_for_each_safe(tmp, next, &ctrl->slot_list) {
 		slot = list_entry(tmp, struct slot, slot_list);
 		list_del(&slot->slot_list);
-		if (EMI(ctrl->ctrlcap))
+		if (EMI(ctrl))
 			sysfs_remove_file(&slot->hotplug_slot->kobj,
 				&hotplug_slot_attr_lock.attr);
 		cancel_delayed_work(&slot->work);
@@ -312,7 +312,7 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
 
 	hotplug_slot->info->attention_status = status;
 
-	if (ATTN_LED(slot->ctrl->ctrlcap))
+	if (ATTN_LED(slot->ctrl))
 		slot->hpc_ops->set_attention_status(slot, status);
 
 	return 0;
@@ -479,7 +479,7 @@ static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_
 		if (rc)	/* -ENODEV: shouldn't happen, but deal with it */
 			value = 0;
 	}
-	if ((POWER_CTRL(ctrl->ctrlcap)) && !value) {
+	if ((POWER_CTRL(ctrl)) && !value) {
 		rc = t_slot->hpc_ops->power_off_slot(t_slot); /* Power off slot if not occupied*/
 		if (rc)
 			goto err_out_free_ctrl_slot;

drivers/pci/hotplug/pciehp_ctrl.c

@@ -178,7 +178,7 @@ u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl)
 static void set_slot_off(struct controller *ctrl, struct slot * pslot)
 {
 	/* turn off slot, turn on Amber LED, turn off Green LED if supported*/
-	if (POWER_CTRL(ctrl->ctrlcap)) {
+	if (POWER_CTRL(ctrl)) {
 		if (pslot->hpc_ops->power_off_slot(pslot)) {
 			err("%s: Issue of Slot Power Off command failed\n",
 			    __func__);
@@ -186,10 +186,10 @@ static void set_slot_off(struct controller *ctrl, struct slot * pslot)
 		}
 	}
 
-	if (PWR_LED(ctrl->ctrlcap))
+	if (PWR_LED(ctrl))
 		pslot->hpc_ops->green_led_off(pslot);
 
-	if (ATTN_LED(ctrl->ctrlcap)) {
+	if (ATTN_LED(ctrl)) {
 		if (pslot->hpc_ops->set_attention_status(pslot, 1)) {
 			err("%s: Issue of Set Attention Led command failed\n",
 			    __func__);
@@ -214,14 +214,14 @@ static int board_added(struct slot *p_slot)
 			__func__, p_slot->device,
 			ctrl->slot_device_offset, p_slot->hp_slot);
 
-	if (POWER_CTRL(ctrl->ctrlcap)) {
+	if (POWER_CTRL(ctrl)) {
 		/* Power on slot */
 		retval = p_slot->hpc_ops->power_on_slot(p_slot);
 		if (retval)
 			return retval;
 	}
 
-	if (PWR_LED(ctrl->ctrlcap))
+	if (PWR_LED(ctrl))
 		p_slot->hpc_ops->green_led_blink(p_slot);
 
 	/* Wait for ~1 second */
@@ -254,7 +254,7 @@ static int board_added(struct slot *p_slot)
 	 */
 	if (pcie_mch_quirk)
 		pci_fixup_device(pci_fixup_final, ctrl->pci_dev);
-	if (PWR_LED(ctrl->ctrlcap))
+	if (PWR_LED(ctrl))
   		p_slot->hpc_ops->green_led_on(p_slot);
 
 	return 0;
@@ -279,7 +279,7 @@ static int remove_board(struct slot *p_slot)
 
 	dbg("In %s, hp_slot = %d\n", __func__, p_slot->hp_slot);
 
-	if (POWER_CTRL(ctrl->ctrlcap)) {
+	if (POWER_CTRL(ctrl)) {
 		/* power off slot */
 		retval = p_slot->hpc_ops->power_off_slot(p_slot);
 		if (retval) {
@@ -289,7 +289,7 @@ static int remove_board(struct slot *p_slot)
 		}
 	}
 
-	if (PWR_LED(ctrl->ctrlcap))
+	if (PWR_LED(ctrl))
 		/* turn off Green LED */
 		p_slot->hpc_ops->green_led_off(p_slot);
 
@@ -327,7 +327,7 @@ static void pciehp_power_thread(struct work_struct *work)
 	case POWERON_STATE:
 		mutex_unlock(&p_slot->lock);
 		if (pciehp_enable_slot(p_slot) &&
-		    PWR_LED(p_slot->ctrl->ctrlcap))
+		    PWR_LED(p_slot->ctrl))
 			p_slot->hpc_ops->green_led_off(p_slot);
 		mutex_lock(&p_slot->lock);
 		p_slot->state = STATIC_STATE;
@@ -409,9 +409,9 @@ static void handle_button_press_event(struct slot *p_slot)
 			     "press.\n", p_slot->name);
 		}
 		/* blink green LED and turn off amber */
-		if (PWR_LED(ctrl->ctrlcap))
+		if (PWR_LED(ctrl))
 			p_slot->hpc_ops->green_led_blink(p_slot);
-		if (ATTN_LED(ctrl->ctrlcap))
+		if (ATTN_LED(ctrl))
 			p_slot->hpc_ops->set_attention_status(p_slot, 0);
 
 		schedule_delayed_work(&p_slot->work, 5*HZ);
@@ -427,13 +427,13 @@ static void handle_button_press_event(struct slot *p_slot)
 		dbg("%s: button cancel\n", __func__);
 		cancel_delayed_work(&p_slot->work);
 		if (p_slot->state == BLINKINGOFF_STATE) {
-			if (PWR_LED(ctrl->ctrlcap))
+			if (PWR_LED(ctrl))
 				p_slot->hpc_ops->green_led_on(p_slot);
 		} else {
-			if (PWR_LED(ctrl->ctrlcap))
+			if (PWR_LED(ctrl))
 				p_slot->hpc_ops->green_led_off(p_slot);
 		}
-		if (ATTN_LED(ctrl->ctrlcap))
+		if (ATTN_LED(ctrl))
 			p_slot->hpc_ops->set_attention_status(p_slot, 0);
 		info("PCI slot #%s - action canceled due to button press\n",
 		     p_slot->name);
@@ -492,16 +492,16 @@ static void interrupt_event_handler(struct work_struct *work)
 		handle_button_press_event(p_slot);
 		break;
 	case INT_POWER_FAULT:
-		if (!POWER_CTRL(ctrl->ctrlcap))
+		if (!POWER_CTRL(ctrl))
 			break;
-		if (ATTN_LED(ctrl->ctrlcap))
+		if (ATTN_LED(ctrl))
 			p_slot->hpc_ops->set_attention_status(p_slot, 1);
-		if (PWR_LED(ctrl->ctrlcap))
+		if (PWR_LED(ctrl))
 			p_slot->hpc_ops->green_led_off(p_slot);
 		break;
 	case INT_PRESENCE_ON:
 	case INT_PRESENCE_OFF:
-		if (!HP_SUPR_RM(ctrl->ctrlcap))
+		if (!HP_SUPR_RM(ctrl))
 			break;
 		dbg("Surprise Removal\n");
 		update_slot_info(p_slot);
@@ -531,7 +531,7 @@ int pciehp_enable_slot(struct slot *p_slot)
 		mutex_unlock(&p_slot->ctrl->crit_sect);
 		return -ENODEV;
 	}
-	if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
+	if (MRL_SENS(p_slot->ctrl)) {
 		rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 		if (rc || getstatus) {
 			info("%s: latch open on slot(%s)\n", __func__,
@@ -541,7 +541,7 @@ int pciehp_enable_slot(struct slot *p_slot)
 		}
 	}
 
-	if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
+	if (POWER_CTRL(p_slot->ctrl)) {
 		rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 		if (rc || getstatus) {
 			info("%s: already enabled on slot(%s)\n", __func__,
@@ -576,7 +576,7 @@ int pciehp_disable_slot(struct slot *p_slot)
 	/* Check to see if (latch closed, card present, power on) */
 	mutex_lock(&p_slot->ctrl->crit_sect);
 
-	if (!HP_SUPR_RM(p_slot->ctrl->ctrlcap)) {
+	if (!HP_SUPR_RM(p_slot->ctrl)) {
 		ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
 		if (ret || !getstatus) {
 			info("%s: no adapter on slot(%s)\n", __func__,
@@ -586,7 +586,7 @@ int pciehp_disable_slot(struct slot *p_slot)
 		}
 	}
 
-	if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
+	if (MRL_SENS(p_slot->ctrl)) {
 		ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 		if (ret || getstatus) {
 			info("%s: latch open on slot(%s)\n", __func__,
@@ -596,7 +596,7 @@ int pciehp_disable_slot(struct slot *p_slot)
 		}
 	}
 
-	if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
+	if (POWER_CTRL(p_slot->ctrl)) {
 		ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 		if (ret || !getstatus) {
 			info("%s: already disabled slot(%s)\n", __func__,

drivers/pci/hotplug/pciehp_hpc.c

@@ -1058,11 +1058,11 @@ int pcie_init_hardware_part2(struct controller *ctrl, struct pcie_device *dev)
 	}
 
 	cmd = PRSN_DETECT_ENABLE;
-	if (ATTN_BUTTN(ctrl->ctrlcap))
+	if (ATTN_BUTTN(ctrl))
 		cmd |= ATTN_BUTTN_ENABLE;
-	if (POWER_CTRL(ctrl->ctrlcap))
+	if (POWER_CTRL(ctrl))
 		cmd |= PWR_FAULT_DETECT_ENABLE;
-	if (MRL_SENS(ctrl->ctrlcap))
+	if (MRL_SENS(ctrl))
 		cmd |= MRL_DETECT_ENABLE;
 	if (!pciehp_poll_mode)
 		cmd |= HP_INTR_ENABLE;
@@ -1181,7 +1181,7 @@ int pcie_init(struct controller *ctrl, struct pcie_device *dev)
 	ctrl->slot_device_offset = 0;
 	ctrl->num_slots = 1;
 	ctrl->first_slot = slot_cap >> 19;
-	ctrl->ctrlcap = slot_cap & 0x0000007f;
+	ctrl->slot_cap = slot_cap;
 
 	rc = pcie_init_hardware_part1(ctrl, dev);
 	if (rc)