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x86/PCI: Ignore _CRS on Supermicro X8DTH-i/6/iF/6F

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commit 89e9f7bcd8744ea25fcf0ac671b8d72c10d7d790 upstream.

Martin reported that the Supermicro X8DTH-i/6/iF/6F advertises incorrect
host bridge windows via _CRS:

  pci_root PNP0A08:00: host bridge window [io  0xf000-0xffff]
  pci_root PNP0A08:01: host bridge window [io  0xf000-0xffff]

Both bridges advertise the 0xf000-0xffff window, which cannot be correct.

Work around this by ignoring _CRS on this system.  The downside is that we
may not assign resources correctly to hot-added PCI devices (if they are
possible on this system).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=42606
Reported-by: Martin Burnicki <martin.burnicki@meinberg.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bjorn Helgaas 2016-12-28 14:55:16 -06:00 committed by Greg Kroah-Hartman
parent 782b361c93
commit f779e00d2e
1 changed files with 10 additions and 0 deletions
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10
arch/x86/pci/acpi.c
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@ -114,6 +114,16 @@ static const struct dmi_system_id pci_crs_quirks[] __initconst = {
DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
},
},
/* https://bugzilla.kernel.org/show_bug.cgi?id=42606 */
{
.callback = set_nouse_crs,
.ident = "Supermicro X8DTH",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
DMI_MATCH(DMI_PRODUCT_NAME, "X8DTH-i/6/iF/6F"),
DMI_MATCH(DMI_BIOS_VERSION, "2.0a"),
},
},
/* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */
{