Merge back ACPI PCI material for v5.16.

Author: rafaeljw

drivers/acpi/glue.c

@@ -17,6 +17,8 @@
 #include <linux/rwsem.h>
 #include <linux/acpi.h>
 #include <linux/dma-mapping.h>
+#include <linux/pci.h>
+#include <linux/pci-acpi.h>
 #include <linux/platform_device.h>
 
 #include "internal.h"
@@ -287,12 +289,13 @@ EXPORT_SYMBOL_GPL(acpi_unbind_one);
 
 void acpi_device_notify(struct device *dev)
 {
-	struct acpi_bus_type *type = acpi_get_bus_type(dev);
 	struct acpi_device *adev;
 	int ret;
 
 	ret = acpi_bind_one(dev, NULL);
 	if (ret) {
+		struct acpi_bus_type *type = acpi_get_bus_type(dev);
+
 		if (!type)
 			goto err;
 
@@ -304,17 +307,26 @@ void acpi_device_notify(struct device *dev)
 		ret = acpi_bind_one(dev, adev);
 		if (ret)
 			goto err;
-	}
-	adev = ACPI_COMPANION(dev);
 
-	if (dev_is_platform(dev))
-		acpi_configure_pmsi_domain(dev);
+		if (type->setup) {
+			type->setup(dev);
+			goto done;
+		}
+	} else {
+		adev = ACPI_COMPANION(dev);
+
+		if (dev_is_pci(dev)) {
+			pci_acpi_setup(dev, adev);
+			goto done;
+		} else if (dev_is_platform(dev)) {
+			acpi_configure_pmsi_domain(dev);
+		}
+	}
 
-	if (type && type->setup)
-		type->setup(dev);
-	else if (adev->handler && adev->handler->bind)
+	if (adev->handler && adev->handler->bind)
 		adev->handler->bind(dev);
 
+done:
 	acpi_handle_debug(ACPI_HANDLE(dev), "Bound to device %s\n",
 			  dev_name(dev));
 
@@ -327,14 +339,12 @@ void acpi_device_notify(struct device *dev)
 void acpi_device_notify_remove(struct device *dev)
 {
 	struct acpi_device *adev = ACPI_COMPANION(dev);
-	struct acpi_bus_type *type;
 
 	if (!adev)
 		return;
 
-	type = acpi_get_bus_type(dev);
-	if (type && type->cleanup)
-		type->cleanup(dev);
+	if (dev_is_pci(dev))
+		pci_acpi_cleanup(dev, adev);
 	else if (adev->handler && adev->handler->unbind)
 		adev->handler->unbind(dev);
 

drivers/pci/pci-acpi.c

@@ -1356,13 +1356,9 @@ static void pci_acpi_set_external_facing(struct pci_dev *dev)
 		dev->external_facing = 1;
 }
 
-static void pci_acpi_setup(struct device *dev)
+void pci_acpi_setup(struct device *dev, struct acpi_device *adev)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
-	struct acpi_device *adev = ACPI_COMPANION(dev);
-
-	if (!adev)
-		return;
 
 	pci_acpi_optimize_delay(pci_dev, adev->handle);
 	pci_acpi_set_external_facing(pci_dev);
@@ -1386,14 +1382,10 @@ static void pci_acpi_setup(struct device *dev)
 	acpi_device_power_add_dependent(adev, dev);
 }
 
-static void pci_acpi_cleanup(struct device *dev)
+void pci_acpi_cleanup(struct device *dev, struct acpi_device *adev)
 {
-	struct acpi_device *adev = ACPI_COMPANION(dev);
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 
-	if (!adev)
-		return;
-
 	pci_acpi_remove_edr_notifier(pci_dev);
 	pci_acpi_remove_pm_notifier(adev);
 	if (adev->wakeup.flags.valid) {
@@ -1405,20 +1397,6 @@ static void pci_acpi_cleanup(struct device *dev)
 	}
 }
 
-static bool pci_acpi_bus_match(struct device *dev)
-{
-	return dev_is_pci(dev);
-}
-
-static struct acpi_bus_type acpi_pci_bus = {
-	.name = "PCI",
-	.match = pci_acpi_bus_match,
-	.find_companion = acpi_pci_find_companion,
-	.setup = pci_acpi_setup,
-	.cleanup = pci_acpi_cleanup,
-};
-
-
 static struct fwnode_handle *(*pci_msi_get_fwnode_cb)(struct device *dev);
 
 /**
@@ -1460,8 +1438,6 @@ struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus)
 
 static int __init acpi_pci_init(void)
 {
-	int ret;
-
 	if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_MSI) {
 		pr_info("ACPI FADT declares the system doesn't support MSI, so disable it\n");
 		pci_no_msi();
@@ -1472,8 +1448,7 @@ static int __init acpi_pci_init(void)
 		pcie_no_aspm();
 	}
 
-	ret = register_acpi_bus_type(&acpi_pci_bus);
-	if (ret)
+	if (acpi_pci_disabled)
 		return 0;
 
 	pci_set_platform_pm(&acpi_pci_platform_pm);

include/acpi/acpi_bus.h

@@ -570,7 +570,6 @@ struct acpi_bus_type {
 	bool (*match)(struct device *dev);
 	struct acpi_device * (*find_companion)(struct device *);
 	void (*setup)(struct device *);
-	void (*cleanup)(struct device *);
 };
 int register_acpi_bus_type(struct acpi_bus_type *);
 int unregister_acpi_bus_type(struct acpi_bus_type *);

include/linux/pci-acpi.h

@@ -84,6 +84,14 @@ extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
 void acpi_pci_add_bus(struct pci_bus *bus);
 void acpi_pci_remove_bus(struct pci_bus *bus);
 
+#ifdef CONFIG_PCI
+void pci_acpi_setup(struct device *dev, struct acpi_device *adev);
+void pci_acpi_cleanup(struct device *dev, struct acpi_device *adev);
+#else
+static inline void pci_acpi_setup(struct device *dev, struct acpi_device *adev) {}
+static inline void pci_acpi_cleanup(struct device *dev, struct acpi_device *adev) {}
+#endif
+
 #ifdef	CONFIG_ACPI_PCI_SLOT
 void acpi_pci_slot_init(void);
 void acpi_pci_slot_enumerate(struct pci_bus *bus);