This is a note to let you know that I've just added the patch titled

x86/PCI: Make broadcom_postcore_init() check acpi_disabled

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: x86-pci-make-broadcom_postcore_init-check-acpi_disabled.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From ddec3bdee05b06f1dda20ded003c3e10e4184cab Mon Sep 17 00:00:00 2001

From: "Rafael J. Wysocki" rafael.j.wysocki@intel.com Date: Fri, 1 Dec 2017 15:08:12 +0100 Subject: x86/PCI: Make broadcom_postcore_init() check acpi_disabled

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

Patches currently in stable-queue which might be from rafael.j.wysocki@intel.com are

queue-4.4/x86-pci-make-broadcom_postcore_init-check-acpi_disabled.patch