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Subject[ 46/59] x86/PCI: use host bridge _CRS info on MSI MS-7253
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jonathan Nieder <jrnieder@gmail.com>

commit 8411371709610c826bf65684f886bfdfb5780ca1 upstream.

In the spirit of commit 29cf7a30f8a0 ("x86/PCI: use host bridge _CRS
info on ASUS M2V-MX SE"), this DMI quirk turns on "pci_use_crs" by
default on a board that needs it.

This fixes boot failures and oopses introduced in 3e3da00c01d0
("x86/pci: AMD one chain system to use pci read out res"). The quirk
is quite targetted (to a specific board and BIOS version) for two
reasons:

(1) to emphasize that this method of tackling the problem one quirk
at a time is a little insane

(2) to give BIOS vendors an opportunity to use simpler tables and
allow us to return to generic behavior (whatever that happens to
be) with a later BIOS update

In other words, I am not at all happy with having quirks like this.
But it is even worse for the kernel not to work out of the box on
these machines, so...

Reference: https://bugzilla.kernel.org/show_bug.cgi?id=42619
Reported-by: Svante Signell <svante.signell@telia.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/x86/pci/acpi.c | 11 +++++++++++
1 file changed, 11 insertions(+)

--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -54,6 +54,17 @@ static const struct dmi_system_id pci_us
DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
},
},
+ /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
+ {
+ .callback = set_use_crs,
+ .ident = "MSI MS-7253",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
+ DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
+ DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
+ DMI_MATCH(DMI_BIOS_VERSION, "V1.6"),
+ },
+ },
{}
};




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