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| author | Colin Ian King <colin.king@canonical.com> | 2012-11-27 14:09:40 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-27 20:49:01 -0800 |
| commit | 48310adbde5b3448b85d6d6d404cc7ee16339ae5 (patch) | |
| tree | b11d6ff39592e48b3cebd9d98b4cc144e2341d37 | |
| parent | 8dd19b22e59d25a3730c3b536ad9cdc2561517bf (diff) | |
| download | lwn-48310adbde5b3448b85d6d6d404cc7ee16339ae5.tar.gz lwn-48310adbde5b3448b85d6d6d404cc7ee16339ae5.zip | |
PCI: Allow pcie_aspm=force even when FADT indicates it is unsupported
commit 9e16721498b0c3d3ebfa0b503c63d35c0a4c0642 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index 213753b283a6..449f257c8a82 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -773,6 +773,9 @@ 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 */ |