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PCI: Allow pcie_aspm=force even when FADT indicates it is unsupported

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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 <colin.king@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org
This commit is contained in:
Colin Ian King 2012-11-27 14:09:40 +00:00 committed by Bjorn Helgaas
parent d712f686ce
commit 9e16721498
1 changed files with 3 additions and 0 deletions
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3
drivers/pci/pcie/aspm.c
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@ -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
*/