Merge branch 'pci/controller/host-common'

- Move struct pci_host_bridge allocation from pci_host_common_init() to
  callers, which significantly simplifies pcie-apple (Marc Zyngier)

* pci/controller/host-common:
  PCI: host-generic: Move bridge allocation outside of pci_host_common_init()

Author: bjorn-helgaas

drivers/pci/controller/pci-host-common.c

@@ -53,16 +53,12 @@ struct pci_config_window *pci_host_common_ecam_create(struct device *dev,
 EXPORT_SYMBOL_GPL(pci_host_common_ecam_create);
 
 int pci_host_common_init(struct platform_device *pdev,
+			 struct pci_host_bridge *bridge,
 			 const struct pci_ecam_ops *ops)
 {
 	struct device *dev = &pdev->dev;
-	struct pci_host_bridge *bridge;
 	struct pci_config_window *cfg;
 
-	bridge = devm_pci_alloc_host_bridge(dev, 0);
-	if (!bridge)
-		return -ENOMEM;
-
 	of_pci_check_probe_only();
 
 	platform_set_drvdata(pdev, bridge);
@@ -85,12 +81,17 @@ EXPORT_SYMBOL_GPL(pci_host_common_init);
 int pci_host_common_probe(struct platform_device *pdev)
 {
 	const struct pci_ecam_ops *ops;
+	struct pci_host_bridge *bridge;
 
 	ops = of_device_get_match_data(&pdev->dev);
 	if (!ops)
 		return -ENODEV;
 
-	return pci_host_common_init(pdev, ops);
+	bridge = devm_pci_alloc_host_bridge(&pdev->dev, 0);
+	if (!bridge)
+		return -ENOMEM;
+
+	return pci_host_common_init(pdev, bridge, ops);
 }
 EXPORT_SYMBOL_GPL(pci_host_common_probe);
 

drivers/pci/controller/pci-host-common.h

@@ -14,6 +14,7 @@ struct pci_ecam_ops;
 
 int pci_host_common_probe(struct platform_device *pdev);
 int pci_host_common_init(struct platform_device *pdev,
+			 struct pci_host_bridge *bridge,
 			 const struct pci_ecam_ops *ops);
 void pci_host_common_remove(struct platform_device *pdev);
 

drivers/pci/controller/pcie-apple.c

@@ -187,7 +187,6 @@ struct apple_pcie {
 	const struct hw_info	*hw;
 	unsigned long		*bitmap;
 	struct list_head	ports;
-	struct list_head	entry;
 	struct completion	event;
 	struct irq_fwspec	fwspec;
 	u32			nvecs;
@@ -206,9 +205,6 @@ struct apple_pcie_port {
 	int			idx;
 };
 
-static LIST_HEAD(pcie_list);
-static DEFINE_MUTEX(pcie_list_lock);
-
 static void rmw_set(u32 set, void __iomem *addr)
 {
 	writel_relaxed(readl_relaxed(addr) | set, addr);
@@ -724,32 +720,9 @@ static int apple_msi_init(struct apple_pcie *pcie)
 	return 0;
 }
 
-static void apple_pcie_register(struct apple_pcie *pcie)
-{
-	guard(mutex)(&pcie_list_lock);
-
-	list_add_tail(&pcie->entry, &pcie_list);
-}
-
-static void apple_pcie_unregister(struct apple_pcie *pcie)
-{
-	guard(mutex)(&pcie_list_lock);
-
-	list_del(&pcie->entry);
-}
-
 static struct apple_pcie *apple_pcie_lookup(struct device *dev)
 {
-	struct apple_pcie *pcie;
-
-	guard(mutex)(&pcie_list_lock);
-
-	list_for_each_entry(pcie, &pcie_list, entry) {
-		if (pcie->dev == dev)
-			return pcie;
-	}
-
-	return NULL;
+	return pci_host_bridge_priv(dev_get_drvdata(dev));
 }
 
 static struct apple_pcie_port *apple_pcie_get_port(struct pci_dev *pdev)
@@ -875,13 +848,15 @@ static const struct pci_ecam_ops apple_pcie_cfg_ecam_ops = {
 static int apple_pcie_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct pci_host_bridge *bridge;
 	struct apple_pcie *pcie;
 	int ret;
 
-	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
-	if (!pcie)
+	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
+	if (!bridge)
 		return -ENOMEM;
 
+	pcie = pci_host_bridge_priv(bridge);
 	pcie->dev = dev;
 	pcie->hw = of_device_get_match_data(dev);
 	if (!pcie->hw)
@@ -897,13 +872,7 @@ static int apple_pcie_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	apple_pcie_register(pcie);
-
-	ret = pci_host_common_init(pdev, &apple_pcie_cfg_ecam_ops);
-	if (ret)
-		apple_pcie_unregister(pcie);
-
-	return ret;
+	return pci_host_common_init(pdev, bridge, &apple_pcie_cfg_ecam_ops);
 }
 
 static const struct of_device_id apple_pcie_of_match[] = {