PCI/portdrv: Rename pm_iter() to pcie_port_device_iter()

Rename pm_iter() to pcie_port_device_iter() and make it visible outside
CONFIG_PM and portdrv_core.c so it can be used for pciehp slot reset
recovery.

[bhelgaas: split into its own patch]
Link: https://lore.kernel.org/linux-pci/08c046b0-c9f2-3489-eeef-7e7aca435bb9@gmail.com/
Link: https://lore.kernel.org/r/251f4edcc04c14f873ff1c967bc686169cd07d2d.1627638184.git.lukas@wunner.deSigned-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/pcie/portdrv.h

@@ -110,6 +110,7 @@ void pcie_port_service_unregister(struct pcie_port_service_driver *new);
 
 extern struct bus_type pcie_port_bus_type;
 int pcie_port_device_register(struct pci_dev *dev);
+int pcie_port_device_iter(struct device *dev, void *data);
 #ifdef CONFIG_PM
 int pcie_port_device_suspend(struct device *dev);
 int pcie_port_device_resume_noirq(struct device *dev);

drivers/pci/pcie/portdrv_core.c

@@ -367,24 +367,24 @@ int pcie_port_device_register(struct pci_dev *dev)
 	return status;
 }
 
-#ifdef CONFIG_PM
-typedef int (*pcie_pm_callback_t)(struct pcie_device *);
+typedef int (*pcie_callback_t)(struct pcie_device *);
 
-static int pm_iter(struct device *dev, void *data)
+int pcie_port_device_iter(struct device *dev, void *data)
 {
 	struct pcie_port_service_driver *service_driver;
 	size_t offset = *(size_t *)data;
-	pcie_pm_callback_t cb;
+	pcie_callback_t cb;
 
 	if ((dev->bus == &pcie_port_bus_type) && dev->driver) {
 		service_driver = to_service_driver(dev->driver);
-		cb = *(pcie_pm_callback_t *)((void *)service_driver + offset);
+		cb = *(pcie_callback_t *)((void *)service_driver + offset);
 		if (cb)
 			return cb(to_pcie_device(dev));
 	}
 	return 0;
 }
 
+#ifdef CONFIG_PM
 /**
  * pcie_port_device_suspend - suspend port services associated with a PCIe port
  * @dev: PCI Express port to handle
@@ -392,13 +392,13 @@ static int pm_iter(struct device *dev, void *data)
 int pcie_port_device_suspend(struct device *dev)
 {
 	size_t off = offsetof(struct pcie_port_service_driver, suspend);
-	return device_for_each_child(dev, &off, pm_iter);
+	return device_for_each_child(dev, &off, pcie_port_device_iter);
 }
 
 int pcie_port_device_resume_noirq(struct device *dev)
 {
 	size_t off = offsetof(struct pcie_port_service_driver, resume_noirq);
-	return device_for_each_child(dev, &off, pm_iter);
+	return device_for_each_child(dev, &off, pcie_port_device_iter);
 }
 
 /**
@@ -408,7 +408,7 @@ int pcie_port_device_resume_noirq(struct device *dev)
 int pcie_port_device_resume(struct device *dev)
 {
 	size_t off = offsetof(struct pcie_port_service_driver, resume);
-	return device_for_each_child(dev, &off, pm_iter);
+	return device_for_each_child(dev, &off, pcie_port_device_iter);
 }
 
 /**
@@ -418,7 +418,7 @@ int pcie_port_device_resume(struct device *dev)
 int pcie_port_device_runtime_suspend(struct device *dev)
 {
 	size_t off = offsetof(struct pcie_port_service_driver, runtime_suspend);
-	return device_for_each_child(dev, &off, pm_iter);
+	return device_for_each_child(dev, &off, pcie_port_device_iter);
 }
 
 /**
@@ -428,7 +428,7 @@ int pcie_port_device_runtime_suspend(struct device *dev)
 int pcie_port_device_runtime_resume(struct device *dev)
 {
 	size_t off = offsetof(struct pcie_port_service_driver, runtime_resume);
-	return device_for_each_child(dev, &off, pm_iter);
+	return device_for_each_child(dev, &off, pcie_port_device_iter);
 }
 #endif /* PM */