From: David S. Miller <davem@davemloft.net>
Date: Wed, 13 Aug 2014 06:29:09 +0000 (-0700)
Subject: sparc64: Properly claim resources as each PCI bus is probed.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f1d25d37d316b8af202e51a4f82df01e12fe2661;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

sparc64: Properly claim resources as each PCI bus is probed.

Perform a pci_claim_resource() on all valid resources discovered
during the OF device tree scan.

Based almost entirely upon the PCI OF bus probing code which does
the same thing there.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index cc4c31e5185e..b36365f49478 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -617,6 +617,36 @@ static void pci_bus_register_of_sysfs(struct pci_bus *bus)
 		pci_bus_register_of_sysfs(child_bus);
 }
 
+static void pci_claim_bus_resources(struct pci_bus *bus)
+{
+	struct pci_bus *child_bus;
+	struct pci_dev *dev;
+
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+		int i;
+
+		for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+			struct resource *r = &dev->resource[i];
+
+			if (r->parent || !r->start || !r->flags)
+				continue;
+
+			if (ofpci_verbose)
+				printk("PCI: Claiming %s: "
+				       "Resource %d: %016llx..%016llx [%x]\n",
+				       pci_name(dev), i,
+				       (unsigned long long)r->start,
+				       (unsigned long long)r->end,
+				       (unsigned int)r->flags);
+
+			pci_claim_resource(dev, i);
+		}
+	}
+
+	list_for_each_entry(child_bus, &bus->children, node)
+		pci_claim_bus_resources(child_bus);
+}
+
 struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 				 struct device *parent)
 {
@@ -647,6 +677,8 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 	pci_bus_add_devices(bus);
 	pci_bus_register_of_sysfs(bus);
 
+	pci_claim_bus_resources(bus);
+
 	return bus;
 }