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    Subject[ 31/42] x86/PCI: use host bridge _CRS info on MSI MS-7253
    3.0-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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