On Tuesday, March 20, 2018 2:54:09 PM CET Andy Shevchenko wrote:
> dmi_get_bios_year() may return 0 when it is incapable to parse
> the BIOS date string. Previously this has been checked in
> pci_acpi_crs_quirks().
>
> Update the code to restore old behaviour.
>
> Reported-by: Jean Delvare <jdelvare@xxxxxxx>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> arch/x86/pci/acpi.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
> index 00e60de30328..5559dcaddd5e 100644
> --- a/arch/x86/pci/acpi.c
> +++ b/arch/x86/pci/acpi.c
> @@ -140,7 +140,9 @@ static const struct dmi_system_id pci_crs_quirks[] __initconst = {
>
> void __init pci_acpi_crs_quirks(void)
> {
> - if ((dmi_get_bios_year() < 2008) && (iomem_resource.end <= 0xffffffff))
> + int year = dmi_get_bios_year();
> +
> + if (year >= 0 && year < 2008 && iomem_resource.end <= 0xffffffff)
> pci_use_crs = false;
>
> dmi_check_system(pci_crs_quirks);
>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
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