From: Colin Ian King Date: Tue, 27 Nov 2012 14:09:40 +0000 (+0000) Subject: PCI: Allow pcie_aspm=force even when FADT indicates it is unsupported X-Git-Tag: v3.8-rc5~18^2~1 X-Git-Url: http://pileus.org/git/?a=commitdiff_plain;h=9e16721498b0c3d3ebfa0b503c63d35c0a4c0642;p=~andy%2Flinux PCI: Allow pcie_aspm=force even when FADT indicates it is unsupported Right now using pcie_aspm=force will not enable ASPM if the FADT indicates ASPM is unsupported. However, the semantics of force should probably allow for this, especially as they did before 3c076351c4 ("PCI: Rework ASPM disable code") This patch just skips the clearing of any ASPM setup that the firmware has carried out on this bus if pcie_aspm=force is being used. Reference: http://bugs.launchpad.net/bugs/962038 Signed-off-by: Colin Ian King Signed-off-by: Bjorn Helgaas CC: stable@vger.kernel.org --- diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index b52630b8ead..8474b6a4fc9 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -771,6 +771,9 @@ void pcie_clear_aspm(struct pci_bus *bus) { struct pci_dev *child; + if (aspm_force) + return; + /* * Clear any ASPM setup that the firmware has carried out on this bus */