4 files changed, 26 insertions, 18 deletions

diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 8131c08b21e5..b9204ef3ecd7 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -190,11 +190,12 @@ void pciehp_get_power_status(struct slot *slot, u8 *status);
 
 void pciehp_set_attention_status(struct slot *slot, u8 status);
 void pciehp_get_latch_status(struct slot *slot, u8 *status);
-void pciehp_get_adapter_status(struct slot *slot, u8 *status);
 int pciehp_query_power_fault(struct slot *slot);
 void pciehp_green_led_on(struct slot *slot);
 void pciehp_green_led_off(struct slot *slot);
 void pciehp_green_led_blink(struct slot *slot);
+bool pciehp_card_present(struct controller *ctrl);
+bool pciehp_card_present_or_link_active(struct controller *ctrl);
 int pciehp_check_link_status(struct controller *ctrl);
 bool pciehp_check_link_active(struct controller *ctrl);
 void pciehp_release_ctrl(struct controller *ctrl);
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index ccaf01e6eced..d24875102b1f 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -158,7 +158,7 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 	struct pci_dev *pdev = slot->ctrl->pcie->port;
 
 	pci_config_pm_runtime_get(pdev);
-	pciehp_get_adapter_status(slot, value);
+	*value = pciehp_card_present_or_link_active(slot->ctrl);
 	pci_config_pm_runtime_put(pdev);
 	return 0;
 }
@@ -176,12 +176,12 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 static void pciehp_check_presence(struct controller *ctrl)
 {
 	struct slot *slot = ctrl->slot;
-	u8 occupied;
+	bool occupied;
 
 	down_read(&ctrl->reset_lock);
 	mutex_lock(&slot->lock);
 
-	pciehp_get_adapter_status(slot, &occupied);
+	occupied = pciehp_card_present_or_link_active(ctrl);
 	if ((occupied && (slot->state == OFF_STATE ||
 			  slot->state == BLINKINGON_STATE)) ||
 	    (!occupied && (slot->state == ON_STATE ||
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index c4d0f902f1d2..1fda6ea96fdc 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -223,8 +223,7 @@ void pciehp_handle_disable_request(struct slot *slot)
 void pciehp_handle_presence_or_link_change(struct slot *slot, u32 events)
 {
 	struct controller *ctrl = slot->ctrl;
-	bool link_active;
-	u8 present;
+	bool present, link_active;
 
 	/*
 	 * If the slot is on and presence or link has changed, turn it off.
@@ -253,7 +252,7 @@ void pciehp_handle_presence_or_link_change(struct slot *slot, u32 events)
 
 	/* Turn the slot on if it's occupied or link is up */
 	mutex_lock(&slot->lock);
-	pciehp_get_adapter_status(slot, &present);
+	present = pciehp_card_present(ctrl);
 	link_active = pciehp_check_link_active(ctrl);
 	if (!present && !link_active) {
 		mutex_unlock(&slot->lock);
@@ -286,11 +285,6 @@ static int __pciehp_enable_slot(struct slot *p_slot)
 	u8 getstatus = 0;
 	struct controller *ctrl = p_slot->ctrl;
 
-	pciehp_get_adapter_status(p_slot, &getstatus);
-	if (!getstatus) {
-		ctrl_info(ctrl, "Slot(%s): No adapter\n", slot_name(p_slot));
-		return -ENODEV;
-	}
 	if (MRL_SENS(p_slot->ctrl)) {
 		pciehp_get_latch_status(p_slot, &getstatus);
 		if (getstatus) {
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 93003ff81166..d6cd4fbc72da 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -389,13 +389,27 @@ void pciehp_get_latch_status(struct slot *slot, u8 *status)
 	*status = !!(slot_status & PCI_EXP_SLTSTA_MRLSS);
 }
 
-void pciehp_get_adapter_status(struct slot *slot, u8 *status)
+bool pciehp_card_present(struct controller *ctrl)
 {
-	struct pci_dev *pdev = ctrl_dev(slot->ctrl);
+	struct pci_dev *pdev = ctrl_dev(ctrl);
 	u16 slot_status;
 
 	pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status);
-	*status = !!(slot_status & PCI_EXP_SLTSTA_PDS);
+	return slot_status & PCI_EXP_SLTSTA_PDS;
+}
+
+/**
+ * pciehp_card_present_or_link_active() - whether given slot is occupied
+ * @ctrl: PCIe hotplug controller
+ *
+ * Unlike pciehp_card_present(), which determines presence solely from the
+ * Presence Detect State bit, this helper also returns true if the Link Active
+ * bit is set.  This is a concession to broken hotplug ports which hardwire
+ * Presence Detect State to zero, such as Wilocity's [1ae9:0200].
+ */
+bool pciehp_card_present_or_link_active(struct controller *ctrl)
+{
+	return pciehp_card_present(ctrl) || pciehp_check_link_active(ctrl);
 }
 
 int pciehp_query_power_fault(struct slot *slot)
@@ -858,7 +872,7 @@ struct controller *pcie_init(struct pcie_device *dev)
 {
 	struct controller *ctrl;
 	u32 slot_cap, link_cap;
-	u8 occupied, poweron;
+	u8 poweron;
 	struct pci_dev *pdev = dev->port;
 
 	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
@@ -918,9 +932,8 @@ struct controller *pcie_init(struct pcie_device *dev)
 	 * requested yet, so avoid triggering a notification with this command.
 	 */
 	if (POWER_CTRL(ctrl)) {
-		pciehp_get_adapter_status(ctrl->slot, &occupied);
 		pciehp_get_power_status(ctrl->slot, &poweron);
-		if (!occupied && poweron) {
+		if (!pciehp_card_present_or_link_active(ctrl) && poweron) {
 			pcie_disable_notification(ctrl);
 			pciehp_power_off_slot(ctrl->slot);
 		}