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ACPI: fix Supermicro X7DB8+ Boot regression

Browse source 
http://bugzilla.kernel.org/show_bug.cgi?id=7695

Originally we converted bind/unbind to use a new pci bridge driver.
The driver will add/remove _PRT, so we can eventually remove
.bind/.unbind methods.

But we found that some of the _ADR-Based devices don't have _PRT,
i.e. they are not managed by the new ACPI PCI bridge driver.
So that .bind method is not called for some _ADR-Based devices,
which leads to a failure.

Now we make ACPI PCI Root Bridge Driver scan and binds all _ADR-Based devices
once the driver is loaded, in the .add method of ACPI PCI Root Bridge driver.

Extra code path for calling .bind/.unbind when _ADR-Based devices
are hot added/removed is also added.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Rui Zhang 2006-12-21 02:21:13 -05:00 committed by Len Brown
parent e49bd2dd5a
commit 2786f6e388
4 changed files with 43 additions and 55 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

40
drivers/acpi/pci_bind.c
View file

@ -223,6 +223,8 @@ int acpi_pci_bind(struct acpi_device *device)
data->id.segment, data->id.bus,
data->id.device, data->id.function));
data->bus = data->dev->subordinate;
device->ops.bind = acpi_pci_bind;
device->ops.unbind = acpi_pci_unbind;
}
/*
@ -352,6 +354,8 @@ acpi_pci_bind_root(struct acpi_device *device,
data->id = *id;
data->bus = bus;
device->ops.bind = acpi_pci_bind;
device->ops.unbind = acpi_pci_unbind;
acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
@ -374,39 +378,3 @@ acpi_pci_bind_root(struct acpi_device *device,
return result;
}
#define ACPI_PCI_BRIDGE_DRIVER_NAME "ACPI PCI Bridge Driver"
static int acpi_pci_bridge_add(struct acpi_device *device);
static int acpi_pci_bridge_remove(struct acpi_device *device, int type);
static struct acpi_driver acpi_pci_bridge_driver = {
.name = ACPI_PCI_BRIDGE_DRIVER_NAME,
.ids = ACPI_PCI_BRIDGE_HID,
.ops = {
.add = acpi_pci_bridge_add,
.remove = acpi_pci_bridge_remove,
},
};
static int acpi_pci_bridge_add(struct acpi_device *device)
{
return acpi_pci_bind(device);
}
static int acpi_pci_bridge_remove(struct acpi_device *device, int type)
{
return acpi_pci_unbind(device);
}
static int __init acpi_pci_bridge_init(void)
{
if (acpi_pci_disabled)
return 0;
if (acpi_bus_register_driver(&acpi_pci_bridge_driver) < 0)
return -ENODEV;
return 0;
}
/* Should be called after ACPI pci root driver */
subsys_initcall(acpi_pci_bridge_init);

24
drivers/acpi/pci_root.c
View file

@ -151,6 +151,21 @@ static acpi_status try_get_root_bridge_busnr(acpi_handle handle, int *busnum)
return AE_OK;
}
static void acpi_pci_bridge_scan(struct acpi_device *device)
{
int status;
struct acpi_device *child = NULL;
if (device->flags.bus_address)
if (device->parent && device->parent->ops.bind) {
status = device->parent->ops.bind(device);
if (!status) {
list_for_each_entry(child, &device->children, node)
acpi_pci_bridge_scan(child);
}
}
}
static int acpi_pci_root_add(struct acpi_device *device)
{
int result = 0;
@ -159,6 +174,7 @@ static int acpi_pci_root_add(struct acpi_device *device)
acpi_status status = AE_OK;
unsigned long value = 0;
acpi_handle handle = NULL;
struct acpi_device *child;
if (!device)
@ -175,6 +191,8 @@ static int acpi_pci_root_add(struct acpi_device *device)
strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
acpi_driver_data(device) = root;
device->ops.bind = acpi_pci_bind;
/*
* Segment
* -------
@ -294,6 +312,12 @@ static int acpi_pci_root_add(struct acpi_device *device)
result = acpi_pci_irq_add_prt(device->handle, root->id.segment,
root->id.bus);
/*
* Scan and bind all _ADR-Based Devices
*/
list_for_each_entry(child, &device->children, node)
acpi_pci_bridge_scan(child);
end:
if (result) {
if (!list_empty(&root->node))

33
drivers/acpi/scan.c
View file

@ -837,20 +837,6 @@ acpi_video_bus_match(struct acpi_device *device)
return -ENODEV;
}
static int acpi_pci_bridge_match(struct acpi_device *device)
{
acpi_status status;
acpi_handle handle;
/* pci bridge has _PRT but isn't PNP0A03 */
status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
if (ACPI_FAILURE(status))
return -ENODEV;
if (!acpi_match_ids(device, "PNP0A03"))
return -ENODEV;
return 0;
}
static void acpi_device_set_id(struct acpi_device *device,
struct acpi_device *parent, acpi_handle handle,
int type)
@ -886,10 +872,6 @@ static void acpi_device_set_id(struct acpi_device *device,
status = acpi_video_bus_match(device);
if(ACPI_SUCCESS(status))
hid = ACPI_VIDEO_HID;
status = acpi_pci_bridge_match(device);
if(ACPI_SUCCESS(status))
hid = ACPI_PCI_BRIDGE_HID;
}
break;
case ACPI_BUS_TYPE_POWER:
@ -1021,6 +1003,13 @@ static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
if (!rmdevice)
return 0;
/*
* unbind _ADR-Based Devices when hot removal
*/
if (dev->flags.bus_address) {
if ((dev->parent) && (dev->parent->ops.unbind))
dev->parent->ops.unbind(dev);
}
acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT);
return 0;
@ -1137,6 +1126,14 @@ acpi_add_single_object(struct acpi_device **child,
result = acpi_device_register(device, parent);
/*
* Bind _ADR-Based Devices when hot add
*/
if (device->flags.bus_address) {
if (device->parent && device->parent->ops.bind)
device->parent->ops.bind(device);
}
end:
if (!result)
*child = device;

1
include/acpi/acpi_drivers.h
View file

@ -44,7 +44,6 @@
#define ACPI_BUTTON_HID_SLEEPF "ACPI_FSB"
#define ACPI_VIDEO_HID "ACPI_VID"
#define ACPI_PCI_BRIDGE_HID "ACPI_PCI"
/* --------------------------------------------------------------------------
PCI
-------------------------------------------------------------------------- */