diff options
| author | Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> | 2008-12-17 12:07:38 +0900 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-01-07 11:13:10 -0800 |
| commit | c9ffa5a586a97da4d552f89b8f39eea79a63a612 (patch) | |
| tree | 47e4a6de7df1c5d41bff61f8bfc81eb464b8d2c6 /drivers/pci/hotplug/pciehp_core.c | |
| parent | 873392ca514f87eae39f53b6944caf85b1a047cb (diff) | |
PCI: pciehp: add ACPI based slot detection
There is a problem that some non hot-pluggable PCIe slots are detected
as hot-pluggable by pciehp on some platforms. The immediate cause of
this problem is that hot-plug capable bit in the Slot Capabilities
register is set even for non hot-pluggable slots on those platforms.
It seems a BIOS/hardware problem, but we need workaround about that.
Some of those platforms define hot-pluggable PCIe slots on ACPI
namespace properly, while hot-plug capable bit in the Slot
Capabilities register is set improperly. So using ACPI namespace
information in pciehp to detect PCIe hot-pluggable slots would be a
workaround.
This patch adds 'pciehp_detect_mode' module option. When 'acpi' is
specified, pciehp uses ACPI namespace information to detect PCIe
hot-pluggable slots.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/hotplug/pciehp_core.c')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index 39cf248d24e3..5482d4ed8256 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -522,6 +522,7 @@ static int __init pcied_init(void) { int retval = 0; + pciehp_firmware_init(); retval = pcie_port_service_register(&hpdriver_portdrv); dbg("pcie_port_service_register = %d\n", retval); info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |