[PATCH 17/140] ACPI: fix Supermicro X7DB8+ Boot regression

Len Brown
2007-02-07T18:53:20Z

From: Rui Zhang <rui.zhang@intel.com>

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>
---
drivers/acpi/pci_bind.c | 40 ++++------------------------------------
drivers/acpi/pci_root.c | 24 ++++++++++++++++++++++++
drivers/acpi/scan.c | 33 +++++++++++++++------------------
include/acpi/acpi_drivers.h | 1 -
4 files changed, 43 insertions(+), 55 deletions(-)

diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c
index aa05e92..1e2ae6e 100644
--- a/drivers/acpi/pci_bind.c
+++ b/drivers/acpi/pci_bind.c
@@ -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);
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 9cfc741..2e1a74a 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -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))
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 769e54b..30a39ba 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -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;
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index be67750..2781e66 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -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
-------------------------------------------------------------------------- */
--
1.5.0.rc3.39.gec804