Hi Andy,
On Thu, 1 Mar 2018 20:02:18 +0200, Andy Shevchenko wrote:
> Use new dmi_get_bios_year() helper instead of open-coding its
> functionality.
>
> No changes in functionality.
>
> Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> arch/x86/pci/acpi.c | 10 +++++-----
> arch/x86/pci/direct.c | 5 ++---
> arch/x86/pci/mmconfig-shared.c | 9 ++-------
> 3 files changed, 9 insertions(+), 15 deletions(-)
>
> diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
> index 7df49c40665e..52b22137243f 100644
> --- a/arch/x86/pci/acpi.c
> +++ b/arch/x86/pci/acpi.c
> @@ -138,14 +138,14 @@ static const struct dmi_system_id pci_crs_quirks[] __initconst = {
> {}
> };
>
> +#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
> +
> void __init pci_acpi_crs_quirks(void)
> {
> - int year;
> + int year = dmi_get_bios_year();
>
> - if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) {
> - if (iomem_resource.end <= 0xffffffff)
> - pci_use_crs = false;
> - }
> + if (in_range(year, 0, 2008) && iomem_resource.end <= 0xffffffff)
I don't like this, sorry. I find "in_range" confusing, there are many
definitions of it throughout the kernel which differ in the details
(some take a length as 3rd parameter, others take upper boundary, some
include the boundaries, some do not...) The following:
if (year >= 0 && year < 2008 && iomem_resource.end <= 0xffffffff)
is a lot more readable in my opinion. No need to look-up a tricky macro
definition to figure what happens if year is 2008.
> + pci_use_crs = false;
>
> dmi_check_system(pci_crs_quirks);
--
Jean Delvare
SUSE L3 Support
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