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    Subject[PATCH 4.4 017/105] x86/PCI: Make broadcom_postcore_init() check acpi_disabled
    Date
    4.4-stable review patch.  If anyone has any objections, please let me know.

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

    From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

    commit ddec3bdee05b06f1dda20ded003c3e10e4184cab upstream.

    acpi_os_get_root_pointer() may return a valid address even if acpi_disabled
    is set, but the host bridge information from the ACPI tables is not going
    to be used in that case and the Broadcom host bridge initialization should
    not be skipped then, So make broadcom_postcore_init() check acpi_disabled
    too to avoid this issue.

    Fixes: 6361d72b04d1 (x86/PCI: read Broadcom CNB20LE host bridge info before PCI scan)
    Reported-by: Dave Hansen <dave.hansen@linux.intel.com>
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Cc: Bjorn Helgaas <bhelgaas@google.com>
    Cc: Linux PCI <linux-pci@vger.kernel.org>
    Link: https://lkml.kernel.org/r/3186627.pxZj1QbYNg@aspire.rjw.lan
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/x86/pci/broadcom_bus.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/arch/x86/pci/broadcom_bus.c
    +++ b/arch/x86/pci/broadcom_bus.c
    @@ -97,7 +97,7 @@ static int __init broadcom_postcore_init
    * We should get host bridge information from ACPI unless the BIOS
    * doesn't support it.
    */
    - if (acpi_os_get_root_pointer())
    + if (!acpi_disabled && acpi_os_get_root_pointer())
    return 0;
    #endif


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