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[PATCH] pciehp: request control of each hotplug controller individually

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This patch tweaks the way pciehp requests control of the hotplug
hardware from BIOS. It now tries to invoke the ACPI _OSC method
for a specific hotplug controller only, rather than walking the
entire acpi namespace invoking all possible _OSC methods under
all host bridges. This allows us to gain control of each hotplug
controller individually, even if BIOS fails to give us control of
some other hotplug controller in the system.

Signed-off-by: Rajesh Shah <rajesh.shah@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
rajesh.shah@intel.com 2005-10-31 16:20:11 -08:00 • committed by Greg Kroah-Hartman
parent 1a9ed1bfe2
commit 427bf532b5
3 changed files with 10 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

11
drivers/pci/pci-acpi.c
View file

@ -91,9 +91,7 @@ acpi_query_osc (
static acpi_status
acpi_run_osc (
acpi_handle handle,
u32 level,
void *context,
void **retval )
void *context)
{
acpi_status status;
struct acpi_object_list input;
@ -184,7 +182,7 @@ EXPORT_SYMBOL(pci_osc_support_set);
*
* Attempt to take control from Firmware on requested control bits.
**/
acpi_status pci_osc_control_set(u32 flags)
acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
{
acpi_status status;
u32 ctrlset;
@ -198,10 +196,7 @@ acpi_status pci_osc_control_set(u32 flags)
return AE_SUPPORT;
}
ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
status = acpi_get_devices ( PCI_ROOT_HID_STRING,
acpi_run_osc,
ctrlset_buf,
NULL );
status = acpi_run_osc(handle, ctrlset_buf);
if (ACPI_FAILURE (status)) {
ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
}