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| author |   Liu Jiang <jiang.liu@linux.intel.com> | 2015-11-27 11:12:33 +0800 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-12-02 02:30:15 +0100 |
| commit | 727ae8be30b428082d3519817f4fb98b712d457d (patch) | |
| tree | 8a4f4a7b9d0e00233a94548bf86a065a9693cd05 /drivers/acpi/pci_root.c | |
| parent | PCI: Fix OF logic in pci_dma_configure() (diff) | |
| download | linux-dev-727ae8be30b428082d3519817f4fb98b712d457d.tar.xz linux-dev-727ae8be30b428082d3519817f4fb98b712d457d.zip | |
x86/PCI/ACPI: Fix regression caused by commit 4d6b4e69a245
Commit 4d6b4e69a245 ("x86/PCI/ACPI: Use common interface to support
PCI host bridge") converted x86 to use the common interface
acpi_pci_root_create, but the conversion missed on code piece in
arch/x86/pci/bus_numa.c, which causes regression on some legacy
AMD platforms as reported by Arthur Marsh <arthur.marsh@internode.on.net>.
The root causes is that acpi_pci_root_create() fails to insert
host bridge resources into iomem_resource/ioport_resource because
x86_pci_root_bus_resources() has already inserted those resources.
So change x86_pci_root_bus_resources() to not insert resources into
iomem_resource/ioport_resource.
Fixes: 4d6b4e69a245 ("x86/PCI/ACPI: Use common interface to support PCI host bridge")
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reported-and-tested-by: Arthur Marsh <arthur.marsh@internode.on.net>
Reported-and-tested-by: Krzysztof Kolasa <kkolasa@winsoft.pl>
Reported-and-tested-by: Keith Busch <keith.busch@intel.com>
Reported-and-tested-by: Hans de Bruin <jmdebruin@xmsnet.nl>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/pci_root.c')
| -rw-r--r-- | drivers/acpi/pci_root.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 850d7bf0c873..ae3fe4e64203 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -768,6 +768,13 @@ static void pci_acpi_root_add_resources(struct acpi_pci_root_info *info) else continue; + /* + * Some legacy x86 host bridge drivers use iomem_resource and + * ioport_resource as default resource pool, skip it. + */ + if (res == root) + continue; + conflict = insert_resource_conflict(root, res); if (conflict) { dev_info(&info->bridge->dev, |