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| author | Bjorn Helgaas <bhelgaas@google.com> | 2013-09-05 15:07:43 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-09-23 17:40:46 -0600 |
| commit | 65afe91622c456560e20d57a779b807c20822e81 (patch) | |
| tree | 4c5706dfa23005a4876cb67370406f3be6587c0c /drivers/acpi | |
| parent | 1b2a7be60eaaf17bc88368d748471dd70e40befd (diff) | |
| download | blackbird-op-linux-65afe91622c456560e20d57a779b807c20822e81.tar.gz blackbird-op-linux-65afe91622c456560e20d57a779b807c20822e81.zip | |
PCI/ACPI: Skip _OSC control tests if _OSC support call failed
If the _OSC support notification fails, we will never request control
(because "support == OSC_PCI_SEGMENT_GROUPS_SUPPORT", which doesn't include
all the features in ACPI_PCIE_REQ_SUPPORT), so we can return early to
simplify the code.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/pci_root.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 0e2004100c44..67cc43a134ad 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -363,7 +363,7 @@ EXPORT_SYMBOL(acpi_pci_osc_control_set); static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm, int *clear_aspm) { - u32 support, base_support, control; + u32 support, control; acpi_status status; struct acpi_device *device = root->device; acpi_handle handle = device->handle; @@ -372,7 +372,7 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm, * All supported architectures that use ACPI have support for * PCI domains, so we indicate this in _OSC support capabilities. */ - support = base_support = OSC_PCI_SEGMENT_GROUPS_SUPPORT; + support = OSC_PCI_SEGMENT_GROUPS_SUPPORT; if (pci_ext_cfg_avail()) support |= OSC_PCI_EXT_CONFIG_SUPPORT; if (pcie_aspm_support_enabled()) @@ -381,10 +381,10 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm, support |= OSC_PCI_MSI_SUPPORT; status = acpi_pci_osc_support(root, support); if (ACPI_FAILURE(status)) { - dev_info(&device->dev, "ACPI _OSC support " - "notification failed, disabling PCIe ASPM\n"); + dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n", + acpi_format_exception(status)); *no_aspm = 1; - support = base_support; + return; } if (!pcie_ports_disabled |
