Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI: add acpi_find_root_bridge_handle
  PCI: acpi_pcihp: run _OSC on a root bridge
  x86/PCI: irq and pci_ids patch for Intel Ibex Peak PCHs
  x86/PCI: allow scanning of 255 PCI busses
  x86, pci: detect end_bus_number according to acpi/e820 reserved, v2
  pci: debug extra pci bus resources
  pci: debug extra pci resources range

4 files changed, 65 insertions, 18 deletions

diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c
index 93e37f0666ab..e17ef54f0efc 100644
--- a/drivers/pci/hotplug/acpi_pcihp.c
+++ b/drivers/pci/hotplug/acpi_pcihp.c
@@ -382,7 +382,7 @@ EXPORT_SYMBOL_GPL(acpi_get_hp_params_from_firmware);
 int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags)
 {
         acpi_status status;
-        acpi_handle chandle, handle = DEVICE_ACPI_HANDLE(&(dev->dev));
+        acpi_handle chandle, handle;
         struct pci_dev *pdev = dev;
         struct pci_bus *parent;
         struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -399,10 +399,25 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags)
          * Per PCI firmware specification, we should run the ACPI _OSC
          * method to get control of hotplug hardware before using it. If
          * an _OSC is missing, we look for an OSHP to do the same thing.
-         * To handle different BIOS behavior, we look for _OSC and OSHP
-         * within the scope of the hotplug controller and its parents,
+         * To handle different BIOS behavior, we look for _OSC on a root
+         * bridge preferentially (according to PCI fw spec). Later for
+         * OSHP within the scope of the hotplug controller and its parents,
          * upto the host bridge under which this controller exists.
          */
+        handle = acpi_find_root_bridge_handle(pdev);
+        if (handle) {
+                acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
+                dbg("Trying to get hotplug control for %s\n",
+                                (char *)string.pointer);
+                status = pci_osc_control_set(handle, flags);
+                if (ACPI_SUCCESS(status))
+                        goto got_one;
+                kfree(string.pointer);
+                string = (struct acpi_buffer){ ACPI_ALLOCATE_BUFFER, NULL };
+        }
+
+        pdev = dev;
+        handle = DEVICE_ACPI_HANDLE(&dev->dev);
         while (!handle) {
                 /*
                  * This hotplug controller was not listed in the ACPI name
@@ -427,15 +442,9 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags)
                 acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
                 dbg("Trying to get hotplug control for %s \n",
                     (char *)string.pointer);
-                status = pci_osc_control_set(handle, flags);
-                if (status == AE_NOT_FOUND)
-                        status = acpi_run_oshp(handle);
-                if (ACPI_SUCCESS(status)) {
-                        dbg("Gained control for hotplug HW for pci %s (%s)\n",
-                            pci_name(dev), (char *)string.pointer);
-                        kfree(string.pointer);
-                        return 0;
-                }
+                status = acpi_run_oshp(handle);
+                if (ACPI_SUCCESS(status))
+                        goto got_one;
                 if (acpi_root_bridge(handle))
                         break;
                 chandle = handle;
@@ -449,6 +458,11 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags)
 
         kfree(string.pointer);
         return -ENODEV;
+got_one:
+        dbg("Gained control for hotplug HW for pci %s (%s)\n", pci_name(dev),
+                        (char *)string.pointer);
+        kfree(string.pointer);
+        return 0;
 }
 EXPORT_SYMBOL(acpi_get_hp_hw_control_from_firmware);
 
diff --git a/drivers/pci/pcie/aer/aerdrv_acpi.c b/drivers/pci/pcie/aer/aerdrv_acpi.c
index 30f581b8791f..6dd7b13e9808 100644
--- a/drivers/pci/pcie/aer/aerdrv_acpi.c
+++ b/drivers/pci/pcie/aer/aerdrv_acpi.c
@@ -36,12 +36,7 @@ int aer_osc_setup(struct pcie_device *pciedev)
         if (acpi_pci_disabled)
                 return -1;
 
-        /* Find root host bridge */
-        while (pdev->bus->self)
-                pdev = pdev->bus->self;
-        handle = acpi_get_pci_rootbridge_handle(
-                pci_domain_nr(pdev->bus), pdev->bus->number);
-
+        handle = acpi_find_root_bridge_handle(pdev);
         if (handle) {
                 pcie_osc_support_set(OSC_EXT_PCI_CONFIG_SUPPORT);
                 status = pci_osc_control_set(handle,
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index a04498d390c8..cce2f4cb1fbf 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -383,6 +383,7 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
                         res->start = base;
                 if (!res->end)
                         res->end = limit + 0xfff;
+                printk(KERN_INFO "PCI: bridge %s io port: [%llx, %llx]\n", pci_name(dev), res->start, res->end);
         }
 
         res = child->resource[1];
@@ -394,6 +395,7 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
                 res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
                 res->start = base;
                 res->end = limit + 0xfffff;
+                printk(KERN_INFO "PCI: bridge %s 32bit mmio: [%llx, %llx]\n", pci_name(dev), res->start, res->end);
         }
 
         res = child->resource[2];
@@ -429,6 +431,7 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
                 res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM | IORESOURCE_PREFETCH;
                 res->start = base;
                 res->end = limit + 0xfffff;
+                printk(KERN_INFO "PCI: bridge %s %sbit mmio pref: [%llx, %llx]\n", pci_name(dev), (res->flags & PCI_PREF_RANGE_TYPE_64)?"64":"32",res->start, res->end);
         }
 }
 
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 827c0a520e2b..82634a2f1b1d 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -530,6 +530,36 @@ void __ref pci_bus_assign_resources(struct pci_bus *bus)
 }
 EXPORT_SYMBOL(pci_bus_assign_resources);
 
+static void pci_bus_dump_res(struct pci_bus *bus)
+{
+        int i;
+
+        for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
+                struct resource *res = bus->resource[i];
+                if (!res)
+                        continue;
+
+                printk(KERN_INFO "bus: %02x index %x %s: [%llx, %llx]\n", bus->number, i, (res->flags & IORESOURCE_IO)? "io port":"mmio", res->start, res->end);
+        }
+}
+
+static void pci_bus_dump_resources(struct pci_bus *bus)
+{
+        struct pci_bus *b;
+        struct pci_dev *dev;
+
+
+        pci_bus_dump_res(bus);
+
+        list_for_each_entry(dev, &bus->devices, bus_list) {
+                b = dev->subordinate;
+                if (!b)
+                        continue;
+
+                pci_bus_dump_resources(b);
+        }
+}
+
 void __init
 pci_assign_unassigned_resources(void)
 {
@@ -545,4 +575,9 @@ pci_assign_unassigned_resources(void)
                 pci_bus_assign_resources(bus);
                 pci_enable_bridges(bus);
         }
+
+        /* dump the resource on buses */
+        list_for_each_entry(bus, &pci_root_buses, node) {
+                pci_bus_dump_resources(bus);
+        }
 }