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Subject[PATCH 3.10 102/268] x86/PCI: Ignore _CRS on Supermicro X8DTH-i/6/iF/6F
Date
From: Bjorn Helgaas <bhelgaas@google.com>

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: Willy Tarreau <w@1wt.eu>
---
arch/x86/pci/acpi.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index a3b0265..63462c8 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -118,6 +118,16 @@ 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 */
{
--
2.8.0.rc2.1.gbe9624a
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