Commit 89e9f7bc authored Dec 28, 2016 by Bjorn Helgaas

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

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>
CC: stable@vger.kernel.org

parent a782b5f9

arch/x86/pci/acpi.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -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 */
		{