On a fsl p2020rdb-pc board, the onboard pci device is assigned the bus address 0xa0000000 by firmware. But the kernel allocate the cpu address 0xa0000000 ~ 0xbfffffff to this PCIe controller and use 0xe0000000 ~ 0xdfffffff as its bus address. In this case the kernel would think that the bus address in this pci device is correct and leave it unchanged. Then causes this device not work. Even though this looks like a mismatch of the address space between firmware and kernel. I think we should detect this kind of error and fix it automatically if we don't want just to probe only (PCI_PROBE_ONLY is not set). Kevin Hao (2): PCI: make pcibios_bus_to_resource return either success or failure PCI: unset the resource if we can't get the correct CPU address drivers/pci/host-bridge.c | 5 ++++- drivers/pci/probe.c | 9 ++++++--- include/linux/pci.h | 2 +- 3 files changed, 11 insertions(+), 5 deletions(-) -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
