PCI: Move setting pci_host_bridge.busnr out of host drivers

Most host drivers only parse the DT bus range to set the root bus number
in pci_host_bridge.busnr. The ones that don't set busnr are buggy in
that they ignore what's in DT. Let's set busnr in pci_scan_root_bus_bridge()
where we already check for the bus resource and remove setting it in
host drivers.

Link: https://lore.kernel.org/r/20200722022514.1283916-12-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Will Deacon <will@kernel.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Ryder Lee <ryder.lee@mediatek.com>
Cc: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: linux-tegra@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org

drivers/pci/controller/dwc/pcie-designware-host.c

@@ -474,7 +474,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	}
 
 	bridge->sysdata = pp;
-	bridge->busnr = pp->busn->start;
 	bridge->ops = &dw_pcie_ops;
 	bridge->map_irq = of_irq_parse_and_map_pci;
 	bridge->swizzle_irq = pci_common_swizzle;

drivers/pci/controller/pci-aardvark.c

@@ -1104,7 +1104,6 @@ static int advk_pcie_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct advk_pcie *pcie;
-	struct resource *bus;
 	struct pci_host_bridge *bridge;
 	int ret, irq;
 
@@ -1132,12 +1131,11 @@ static int advk_pcie_probe(struct platform_device *pdev)
 	}
 
 	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
-					      &bridge->dma_ranges, &bus);
+					      &bridge->dma_ranges, NULL);
 	if (ret) {
 		dev_err(dev, "Failed to parse resources\n");
 		return ret;
 	}
-	bridge->busnr = bus->start;
 
 	pcie->reset_gpio = devm_gpiod_get_from_of_node(dev, dev->of_node,
 						       "reset-gpios", 0,

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

@@ -77,7 +77,6 @@ int pci_host_common_probe(struct platform_device *pdev)
 		pci_add_flags(PCI_REASSIGN_ALL_BUS);
 
 	bridge->sysdata = cfg;
-	bridge->busnr = cfg->busr.start;
 	bridge->ops = (struct pci_ops *)&ops->pci_ops;
 	bridge->map_irq = of_irq_parse_and_map_pci;
 	bridge->swizzle_irq = pci_common_swizzle;

drivers/pci/controller/pci-tegra.c

@@ -2668,7 +2668,6 @@ static int tegra_pcie_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct pci_host_bridge *host;
 	struct tegra_pcie *pcie;
-	struct resource *bus;
 	int err;
 
 	host = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
@@ -2683,7 +2682,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&pcie->ports);
 	pcie->dev = dev;
 
-	err = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL, &bus);
+	err = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL, NULL);
 	if (err) {
 		dev_err(dev, "Getting bridge resources failed\n");
 		return err;
@@ -2712,7 +2711,6 @@ static int tegra_pcie_probe(struct platform_device *pdev)
 		goto pm_runtime_put;
 	}
 
-	host->busnr = bus->start;
 	host->ops = &tegra_pcie_ops;
 	host->map_irq = tegra_pcie_map_irq;
 	host->swizzle_irq = pci_common_swizzle;

drivers/pci/controller/pci-v3-semi.c

@@ -584,8 +584,6 @@ static int v3_pci_setup_resource(struct v3_pci *v3,
 		}
 		break;
 	case IORESOURCE_BUS:
-		dev_dbg(dev, "BUS %pR\n", win->res);
-		host->busnr = win->res->start;
 		break;
 	default:
 		dev_info(dev, "Unknown resource type %lu\n",

drivers/pci/controller/pcie-mediatek.c

@@ -209,7 +209,6 @@ struct mtk_pcie_port {
  * @mem: non-prefetchable memory resource
  * @ports: pointer to PCIe port information
  * @soc: pointer to SoC-dependent operations
- * @busnr: root bus number
  */
 struct mtk_pcie {
 	struct device *dev;
@@ -218,7 +217,6 @@ struct mtk_pcie {
 
 	struct list_head ports;
 	const struct mtk_pcie_soc *soc;
-	unsigned int busnr;
 };
 
 static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
@@ -1031,16 +1029,13 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
 	struct mtk_pcie_port *port, *tmp;
 	struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
 	struct list_head *windows = &host->windows;
-	struct resource *bus;
 	int err;
 
 	err = pci_parse_request_of_pci_ranges(dev, windows,
-					      &host->dma_ranges, &bus);
+					      &host->dma_ranges, NULL);
 	if (err)
 		return err;
 
-	pcie->busnr = bus->start;
-
 	for_each_available_child_of_node(node, child) {
 		int slot;
 
@@ -1094,7 +1089,6 @@ static int mtk_pcie_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
-	host->busnr = pcie->busnr;
 	host->ops = pcie->soc->ops;
 	host->map_irq = of_irq_parse_and_map_pci;
 	host->swizzle_irq = pci_common_swizzle;

drivers/pci/controller/pcie-rcar-host.c

@@ -224,7 +224,6 @@ static int rcar_pcie_setup(struct list_head *resource,
 			i++;
 			break;
 		case IORESOURCE_BUS:
-			bridge->busnr = res->start;
 			break;
 		default:
 			continue;

drivers/pci/probe.c

@@ -3088,6 +3088,7 @@ int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge)
 
 	resource_list_for_each_entry(window, &bridge->windows)
 		if (window->res->flags & IORESOURCE_BUS) {
+			bridge->busnr = window->res->start;
 			found = true;
 			break;
 		}