On Mon, 28 Feb 2011 10:45:10 +0100 Jiri Slaby <jslaby@xxxxxxx> wrote: > Some broken BIOSes on ICH4 chipset report an ACPI region which is in > conflict with legacy IDE ports when ACPI is disabled. Even though the > regions overlap, IDE ports are working correctly (we cannot find out > the decoding rules on chipsets). > > So the only problem is the reported region itself, if we don't reserve > the region in the quirk everything works as expected. > > This patch avoids reserving any quirk regions below PCIBIOS_MIN_IO > which is 0x1000. Some regions might be (and are by a fast google > query) below this border, but the only difference is that they won't > be reserved anymore. They should still work though the same as before. > > The conflicts look like (1f.0 is bridge, 1f.1 is IDE ctrl): > pci 0000:00:1f.1: address space collision: [io 0x0170-0x0177] conflicts with 0000:00:1f.0 [io 0x0100-0x017f] > > At 0x0100 a 128 bytes long ACPI region is reported in the quirk for > ICH4. ata_piix then fails to find disks because the IDE legacy ports > are zeroed: > ata_piix 0000:00:1f.1: device not available (can't reserve [io 0x0000-0x0007]) Applied both of these, thanks. -- Jesse Barnes, Intel Open Source Technology Center -- 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
