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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2018-03-20 20:08:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-27 11:33:16 +0200 |
| commit | 47a9973d3ed8994589c845c8b1a293a475a549a9 (patch) | |
| tree | 7b9dff2af962ceb405d66a134075f29020379ba6 /arch/x86/pci | |
| parent | 3af345258617e0412059c1ab6462495947f73e89 (diff) | |
| download | linux-47a9973d3ed8994589c845c8b1a293a475a549a9.tar.gz linux-47a9973d3ed8994589c845c8b1a293a475a549a9.tar.bz2 linux-47a9973d3ed8994589c845c8b1a293a475a549a9.zip | |
x86/PCI: Fix a potential regression when using dmi_get_bios_year()
dmi_get_bios_year() may return 0 when it cannot 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@suse.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J . Wysocki <rjw@rjwysocki.net>
Cc: linux-acpi@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Fixes: 69c42d493db4 ("x86/pci: Simplify code by using the new dmi_get_bios_year() helper")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/acpi.c | 4 |
1 files changed, 3 insertions, 1 deletions
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); |