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PCI: Update pcie_ports 'auto' behavior for non-ACPI platforms 

The pcie_ports parameter, which defaults to 'auto', allows a user
to specify if PCIe port services are disabled ('compat'), always
enabled ('native'), or only used when allowed by the BIOS
('auto').

Where CONFIG_ACPI isn't enabled, as is often the case for non
x86/ia64 platforms, the 'auto' behavior results in that of
'compat'. Thus in order to use port services on these platforms
'pcie_ports=native' must be added to the kernel command line.

This patch results in the 'native' behavior being followed where
'auto' is selected and ACPI is not enabled.

Signed-off-by: Andrew Murray <amurray@embedded-bits.co.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
hifive-unleashed-5.1
Andrew Murray 2013-10-26 18:23:25 +01:00 committed by Bjorn Helgaas
parent 0394cb192d
commit 6b87e700cd
1 changed files with 8 additions and 7 deletions
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15
drivers/pci/pcie/portdrv_core.c
View File

@ -260,13 +260,14 @@ static int get_port_device_capability(struct pci_dev *dev)
if (pcie_ports_disabled)
return 0;
err = pcie_port_platform_notify(dev, &cap_mask);
if (!pcie_ports_auto) {
cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP
| PCIE_PORT_SERVICE_VC;
if (pci_aer_available())
cap_mask |= PCIE_PORT_SERVICE_AER;
} else if (err) {
cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP
| PCIE_PORT_SERVICE_VC;
if (pci_aer_available())
cap_mask |= PCIE_PORT_SERVICE_AER;
if (pcie_ports_auto) {
err = pcie_port_platform_notify(dev, &cap_mask);
if (err)
return 0;
}