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authorMika Westerberg <mika.westerberg@linux.intel.com>2013-07-03 18:04:48 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-07-23 05:55:56 +0400
commitc70d65052a1c792bae8d1bb84845f15526b74997 (patch)
tree27e1e0ea736c7bd5051618d65e604782ec9300f4 /include/linux/pci-acpi.h
parent3b2f64d00c46e1e4e9bd0bb9bb12619adac27a4b (diff)
downloadlinux-c70d65052a1c792bae8d1bb84845f15526b74997.tar.xz
x86 / PCI: prevent re-allocation of already existing bridge and ROM resources
In hotplug case (especially with Thunderbolt enabled systems) we might need to call pcibios_resource_survey_bus() several times for a bus. The function ends up calling pci_claim_resource() for each bridge resource that then fails claiming that the resource exists already (which it does). Once this happens the resource is invalidated thus preventing devices behind the bridge to allocate their resources. To fix this we do what has been done in pcibios_allocate_dev_resources() and check 'parent' of the given resource. If it is non-NULL it means that the resource has been allocated already and we can skip it. We do the same for ROM resources as well. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/pci-acpi.h')
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