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x86/PCI: Make broadcom_postcore_init() check acpi_disabled

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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>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/3186627.pxZj1QbYNg@aspire.rjw.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Rafael J. Wysocki 2017-12-01 15:08:12 +01:00 committed by Ingo Molnar
parent f4e9b7af0c
commit ddec3bdee0
1 changed files with 1 additions and 1 deletions
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2
arch/x86/pci/broadcom_bus.c
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@ -97,7 +97,7 @@ static int __init broadcom_postcore_init(void)
* 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