On Thu, Dec 4, 2014 at 8:15 AM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: > On Wed, Dec 03, 2014 at 05:41:32PM -0800, Yinghai Lu wrote: >> On Wed, Dec 3, 2014 at 5:38 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote: >> > On Wed, Dec 3, 2014 at 2:15 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: >> >> There's a bugzilla for this, so this email is to make the bugzilla >> >> more discoverable and to have a more public discussion about it. >> >> >> >> https://bugzilla.kernel.org/show_bug.cgi?id=85491 >> >> >> >> I think this regression is caused by 5b28541552ef ("PCI: Restrict >> >> 64-bit prefetchable bridge windows to 64-bit resources"). These dmesg >> >> fragments are from v3.16, which doesn't work: >> >> >> >> pci_bus 0000:00: root bus resource [mem 0xc0000000-0xffffffff] >> >> >> >> pci 0000:00:01.0: PCI bridge to [bus 01] >> >> pci 0000:00:01.0: bridge window [io 0x8000-0xafff] >> >> pci 0000:00:01.0: bridge window [mem 0xfdf00000-0xfdffffff] >> >> pci 0000:00:01.0: bridge window [mem 0xbdf00000-0xddefffff 64bit >> >> pref] <-- outside host bridge window >> >> >> >> pci 0000:01:00.0: reg 0x10: [mem 0xc0000000-0xcfffffff pref] >> >> pci 0000:01:00.0: reg 0x14: [io 0xa000-0xa0ff] >> >> pci 0000:01:00.0: reg 0x18: [mem 0xfdff0000-0xfdffffff] >> >> pci 0000:01:00.0: reg 0x30: [mem 0xfdfc0000-0xfdfdffff pref] >> >> >> >> pci 0000:00:01.0: can't claim BAR 15 [mem 0xbdf00000-0xddefffff >> >> 64bit pref]: no compatible bridge window >> >> pci 0000:01:00.0: can't claim BAR 0 [mem 0xc0000000-0xcfffffff >> >> pref]: no compatible bridge window >> > >> > Looks like we wrong type checking from parent resource searching. > > I don't understand what you're trying to say, but I don't think the "no > compatible bridge window" problem is related to resource types. I think > it's because the 00:01.0 window at [mem 0xbdf00000-0xddefffff] starts > before the [mem 0xc0000000-0xffffffff] host bridge window. on this system _CRS is not used. conflicts with System RAM [mem 0x00100000-0xbff9ffff] Are you going to enforce using _CRS on this system with DMI ? Yinghai -- 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
