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authorBjorn Helgaas <bhelgaas@google.com>2012-01-18 01:41:21 +0100
committerJesse Barnes <jbarnes@virtuousgeek.org>2012-02-14 17:44:49 +0100
commit316d86fe8641abfad32702c77d9e62cf19e68b00 (patch)
treed3f32aaf5deaea326b225bd22f8a2e760eae3266 /drivers
parentxen/pciback: Support pci_reset_function, aka FLR or D3 support. (diff)
downloadlinux-316d86fe8641abfad32702c77d9e62cf19e68b00.tar.xz
linux-316d86fe8641abfad32702c77d9e62cf19e68b00.zip
x86/PCI: don't fall back to defaults if _CRS has no apertures
Host bridges that lead to things like the Uncore need not have any I/O port or MMIO apertures. For example, in this case: ACPI: PCI Root Bridge [UNC1] (domain 0000 [bus ff]) PCI: root bus ff: using default resources PCI host bridge to bus 0000:ff pci_bus 0000:ff: root bus resource [io 0x0000-0xffff] pci_bus 0000:ff: root bus resource [mem 0x00000000-0x3fffffffffff] we should not pretend those default resources are available on bus ff. CC: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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