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PCI/ASPM: Don't touch ASPM if forcibly disabled

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Don't allocate and track PCIe ASPM state when "pcie_aspm=off" is specified
on the kernel command line.

Based-on-patch-from: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: David Bulkow <david.bulkow@stratus.com>
Acked-by: Myron Stowe <myron.stowe@redhat.com>
This commit is contained in:
Joe Lawrence 2013-01-15 15:31:28 -05:00 committed by Bjorn Helgaas
parent 84fb913c43
commit a26d5ecb32
1 changed files with 3 additions and 0 deletions
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3
drivers/pci/pcie/aspm.c
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@ -556,6 +556,9 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev)
struct pcie_link_state *link;
int blacklist = !!pcie_aspm_sanity_check(pdev);
if (!aspm_support_enabled)
return;
if (!pci_is_pcie(pdev) || pdev->link_state)
return;
if (pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT &&