PCI: rcar: Fix I/O offset for multiple host bridges

Fix I/O offset for multiple host bridges.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>

drivers/pci/host/pcie-rcar.c

@@ -108,6 +108,8 @@
 #define RCAR_PCI_MAX_RESOURCES 4
 #define MAX_NR_INBOUND_MAPS 6
 
+static unsigned long global_io_offset;
+
 struct rcar_msi {
 	DECLARE_BITMAP(used, INT_PCI_MSI_NR);
 	struct irq_domain *domain;
@@ -357,7 +359,7 @@ static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie)
 	rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win));
 }
 
-static int rcar_pcie_setup(int nr, struct list_head *resource, struct rcar_pcie *pcie)
+static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pcie)
 {
 	struct resource *res;
 	int i;
@@ -375,7 +377,8 @@ static int rcar_pcie_setup(int nr, struct list_head *resource, struct rcar_pcie
 
 		if (res->flags & IORESOURCE_IO) {
 			phys_addr_t io_start = pci_pio_to_address(res->start);
-			pci_ioremap_io(nr * SZ_64K, io_start);
+			pci_ioremap_io(global_io_offset, io_start);
+			global_io_offset += SZ_64K;
 		}
 
 		pci_add_resource(resource, res);
@@ -390,7 +393,7 @@ static int rcar_pcie_enable(struct rcar_pcie *pcie)
 	struct pci_bus *bus, *child;
 	LIST_HEAD(res);
 
-	rcar_pcie_setup(1, &res, pcie);
+	rcar_pcie_setup(&res, pcie);
 
 	/* Do not reassign resources if probe only */
 	if (!pci_has_flag(PCI_PROBE_ONLY))