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PCI: PCIe: Introduce commad line switch for disabling port services

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Introduce kernel command line switch pcie_ports= allowing one to
disable all of the native PCIe port services, so that PCIe ports
are treated like PCI-to-PCI bridges.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki
2010-08-21 01:51:44 +02:00
committed by Jesse Barnes
parent f1a7bfaf6b
commit 79dd9182db
4 changed files with 24 additions and 0 deletions
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15
drivers/pci/pcie/portdrv_pci.c
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@@ -29,6 +29,18 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/* If this switch is set, PCIe port native services should not be enabled. */
bool pcie_ports_disabled;
static int __init pcie_port_setup(char *str)
{
if (!strncmp(str, "compat", 6))
pcie_ports_disabled = true;
return 1;
}
__setup("pcie_ports=", pcie_port_setup);
/* global data */
static int pcie_portdrv_restore_config(struct pci_dev *dev)
@@ -301,6 +313,9 @@ static int __init pcie_portdrv_init(void)
{
int retval;
if (pcie_ports_disabled)
return -EACCES;
dmi_check_system(pcie_portdrv_dmi_table);
retval = pcie_port_bus_register();