There are BIOSes out there where they provide ACPI mapping that conflicts with fixed one. Then e.g. an IDE controller doesn't work due to I/O space conflict: pci 0000:00:1f.1: address space collision: [io 0x0170-0x0177] conflicts with 0000:00:1f.0 [io 0x0100-0x017f] 0x0170-0x0177 for IDE controllers is created in pci_setup_device. 0x0100-0x017f for the ICH4 ISA bridge is created in quirk_ich4_lpc_acpi The former is fixed, according to specs at that address. The latter is read from the bridge confspace which contains: 00000000 86 80 a1 25 0f 00 80 02 02 00 01 06 00 00 80 00 |...%............| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000040 01 01 00 00 10 00 00 00 00 00 00 00 00 00 01 00 |................| 00000050 00 00 00 00 00 00 00 00 01 05 00 00 10 00 00 00 |................| ... I.e. 0x00000101 as a base (ORed by 1 meaning I/O space) for ACPI per ICH4 specs. Don't accept bases below 0x180 for this dynamic mapping. Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> --- drivers/pci/quirks.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 53a786f..6d241eb 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -543,7 +543,14 @@ static void __devinit quirk_ich4_lpc_acpi(struct pci_dev *dev) u32 region; pci_read_config_dword(dev, 0x40, ®ion); - quirk_io_region(dev, region, 128, PCI_BRIDGE_RESOURCES, "ICH4 ACPI/GPIO/TCO"); + /* + * some BIOSes are bogus and create this dynamic mapping so that it + * conflicts with fixed. There is no space below 0x180 for + * ACPI/GPIO/TCO which is 128B long and 128B aligned. + */ + if (region >= 0x180) + quirk_io_region(dev, region, 128, PCI_BRIDGE_RESOURCES, + "ICH4 ACPI/GPIO/TCO"); pci_read_config_dword(dev, 0x58, ®ion); quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES+1, "ICH4 GPIO"); -- 1.7.3.4 -- 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
