Previously we used "flags" for both:
- the bitmask of features we support (segments, ASPM, MSI, etc.), and
- the bitmask of features we want to control (native hotplug, AER, etc.)
To reduce confusion, this patch splits this into two variables:
"support" is the bitmask of features we support, and "control" is the
bitmask of features we want to control. No functional change.
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
---
drivers/acpi/pci_root.c | 35 ++++++++++++++++++-----------------
1 file changed, 18 insertions(+), 17 deletions(-)
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 3e57f10..3e06d4e 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 flags, base_flags;
+ u32 support, base_support, control;
acpi_status status;
struct acpi_device *device = root->device;
acpi_handle handle = device->handle;
@@ -372,29 +372,29 @@ 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.
*/
- flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
- acpi_pci_osc_support(root, flags);
+ support = base_support = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
+ acpi_pci_osc_support(root, support);
if (pci_ext_cfg_avail())
- flags |= OSC_PCI_EXT_CONFIG_SUPPORT;
+ support |= OSC_PCI_EXT_CONFIG_SUPPORT;
if (pcie_aspm_support_enabled()) {
- flags |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT;
+ support |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT;
}
if (pci_msi_enabled())
- flags |= OSC_PCI_MSI_SUPPORT;
- if (flags != base_flags) {
- status = acpi_pci_osc_support(root, flags);
+ support |= OSC_PCI_MSI_SUPPORT;
+ if (support != base_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");
*no_aspm = 1;
- flags = base_flags;
+ support = base_support;
}
}
if (!pcie_ports_disabled
- && (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) {
- flags = OSC_PCI_EXPRESS_CAPABILITY_CONTROL
+ && (support & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) {
+ control = OSC_PCI_EXPRESS_CAPABILITY_CONTROL
| OSC_PCI_EXPRESS_NATIVE_HP_CONTROL
| OSC_PCI_EXPRESS_PME_CONTROL;
@@ -403,17 +403,18 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm,
dev_dbg(&device->dev,
"PCIe errors handled by BIOS.\n");
else
- flags |= OSC_PCI_EXPRESS_AER_CONTROL;
+ control |= OSC_PCI_EXPRESS_AER_CONTROL;
}
dev_info(&device->dev,
- "Requesting ACPI _OSC control (0x%02x)\n", flags);
+ "Requesting ACPI _OSC control (0x%02x)\n", control);
- status = acpi_pci_osc_control_set(handle, &flags,
+ status = acpi_pci_osc_control_set(handle, &control,
OSC_PCI_EXPRESS_CAPABILITY_CONTROL);
if (ACPI_SUCCESS(status)) {
dev_info(&device->dev,
- "ACPI _OSC control (0x%02x) granted\n", flags);
+ "ACPI _OSC control (0x%02x) granted\n",
+ control);
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
/*
* We have ASPM control, but the FADT indicates
@@ -425,7 +426,7 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm,
dev_info(&device->dev,
"ACPI _OSC request failed (%s), "
"returned control mask: 0x%02x\n",
- acpi_format_exception(status), flags);
+ acpi_format_exception(status), control);
dev_info(&device->dev,
"ACPI _OSC control for PCIe not granted, disabling ASPM\n");
/*
@@ -440,7 +441,7 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm,
} else {
dev_info(&device->dev,
"Unable to request _OSC control "
- "(_OSC support mask: 0x%02x)\n", flags);
+ "(_OSC support mask: 0x%02x)\n", support);
}
}
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