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authorRajesh Shah <rajesh.shah@intel.com>2005-04-28 00:25:52 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2005-06-27 21:52:42 -0700
commit3fb02738b0fd36f47710a2bf207129efd2f5daa2 (patch)
tree56bd70ea1b957b601402745ee03b4c1b293ab23b /drivers/acpi
parentf7d473d919627262816459f8dba70d72812be074 (diff)
[PATCH] acpi bridge hotadd: Allow ACPI .add and .start operations to be done independently
Create new interfaces to recursively add an acpi namespace object to the acpi device list, and recursively start the namespace object. This is needed for ACPI based hotplug of a root bridge hierarchy where the add operation must be performed first and the start operation must be performed separately after the hot-plugged devices have been properly configured. Signed-off-by: Rajesh Shah <rajesh.shah@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/container.c2
-rw-r--r--drivers/acpi/processor_core.c2
-rw-r--r--drivers/acpi/scan.c126
3 files changed, 103 insertions, 27 deletions
diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
index 5a0adbf8bc0..97013ddfa20 100644
--- a/drivers/acpi/container.c
+++ b/drivers/acpi/container.c
@@ -153,7 +153,7 @@ container_device_add(struct acpi_device **device, acpi_handle handle)
return_VALUE(-ENODEV);
}
- result = acpi_bus_scan(*device);
+ result = acpi_bus_start(*device);
return_VALUE(result);
}
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index f4778747e88..76156ac91bd 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -723,7 +723,7 @@ int acpi_processor_device_add(
return_VALUE(-ENODEV);
}
- acpi_bus_scan(*device);
+ acpi_bus_start(*device);
pr = acpi_driver_data(*device);
if (!pr)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index e8588559328..337d49b5564 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -553,20 +553,29 @@ acpi_bus_driver_init (
* upon possible configuration and currently allocated resources.
*/
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Driver successfully bound to device\n"));
+ return_VALUE(0);
+}
+
+int
+acpi_start_single_object (
+ struct acpi_device *device)
+{
+ int result = 0;
+ struct acpi_driver *driver;
+
+ ACPI_FUNCTION_TRACE("acpi_start_single_object");
+
+ if (!(driver = device->driver))
+ return_VALUE(0);
+
if (driver->ops.start) {
result = driver->ops.start(device);
if (result && driver->ops.remove)
driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
- return_VALUE(result);
}
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Driver successfully bound to device\n"));
-
- if (driver->ops.scan) {
- driver->ops.scan(device);
- }
-
- return_VALUE(0);
+ return_VALUE(result);
}
static int acpi_driver_attach(struct acpi_driver * drv)
@@ -586,6 +595,7 @@ static int acpi_driver_attach(struct acpi_driver * drv)
if (!acpi_bus_match(dev, drv)) {
if (!acpi_bus_driver_init(dev, drv)) {
+ acpi_start_single_object(dev);
atomic_inc(&drv->references);
count++;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n",
@@ -1009,8 +1019,8 @@ acpi_bus_remove (
}
-int
-acpi_bus_add (
+static int
+acpi_add_single_object (
struct acpi_device **child,
struct acpi_device *parent,
acpi_handle handle,
@@ -1019,7 +1029,7 @@ acpi_bus_add (
int result = 0;
struct acpi_device *device = NULL;
- ACPI_FUNCTION_TRACE("acpi_bus_add");
+ ACPI_FUNCTION_TRACE("acpi_add_single_object");
if (!child)
return_VALUE(-EINVAL);
@@ -1140,7 +1150,7 @@ acpi_bus_add (
*
* TBD: Assumes LDM provides driver hot-plug capability.
*/
- acpi_bus_find_driver(device);
+ result = acpi_bus_find_driver(device);
end:
if (!result)
@@ -1153,10 +1163,10 @@ end:
return_VALUE(result);
}
-EXPORT_SYMBOL(acpi_bus_add);
-int acpi_bus_scan (struct acpi_device *start)
+static int acpi_bus_scan (struct acpi_device *start,
+ struct acpi_bus_ops *ops)
{
acpi_status status = AE_OK;
struct acpi_device *parent = NULL;
@@ -1229,9 +1239,20 @@ int acpi_bus_scan (struct acpi_device *start)
continue;
}
- status = acpi_bus_add(&child, parent, chandle, type);
- if (ACPI_FAILURE(status))
- continue;
+ if (ops->acpi_op_add)
+ status = acpi_add_single_object(&child, parent,
+ chandle, type);
+ else
+ status = acpi_bus_get_device(chandle, &child);
+
+ if (ACPI_FAILURE(status))
+ continue;
+
+ if (ops->acpi_op_start) {
+ status = acpi_start_single_object(child);
+ if (ACPI_FAILURE(status))
+ continue;
+ }
/*
* If the device is present, enabled, and functioning then
@@ -1257,8 +1278,50 @@ int acpi_bus_scan (struct acpi_device *start)
return_VALUE(0);
}
-EXPORT_SYMBOL(acpi_bus_scan);
+int
+acpi_bus_add (
+ struct acpi_device **child,
+ struct acpi_device *parent,
+ acpi_handle handle,
+ int type)
+{
+ int result;
+ struct acpi_bus_ops ops;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_add");
+
+ result = acpi_add_single_object(child, parent, handle, type);
+ if (!result) {
+ memset(&ops, 0, sizeof(ops));
+ ops.acpi_op_add = 1;
+ result = acpi_bus_scan(*child, &ops);
+ }
+ return_VALUE(result);
+}
+EXPORT_SYMBOL(acpi_bus_add);
+
+int
+acpi_bus_start (
+ struct acpi_device *device)
+{
+ int result;
+ struct acpi_bus_ops ops;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_start");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ result = acpi_start_single_object(device);
+ if (!result) {
+ memset(&ops, 0, sizeof(ops));
+ ops.acpi_op_start = 1;
+ result = acpi_bus_scan(device, &ops);
+ }
+ return_VALUE(result);
+}
+EXPORT_SYMBOL(acpi_bus_start);
static int
acpi_bus_trim(struct acpi_device *start,
@@ -1331,13 +1394,19 @@ acpi_bus_scan_fixed (
/*
* Enumerate all fixed-feature devices.
*/
- if (acpi_fadt.pwr_button == 0)
- result = acpi_bus_add(&device, acpi_root,
+ if (acpi_fadt.pwr_button == 0) {
+ result = acpi_add_single_object(&device, acpi_root,
NULL, ACPI_BUS_TYPE_POWER_BUTTON);
+ if (!result)
+ result = acpi_start_single_object(device);
+ }
- if (acpi_fadt.sleep_button == 0)
- result = acpi_bus_add(&device, acpi_root,
+ if (acpi_fadt.sleep_button == 0) {
+ result = acpi_add_single_object(&device, acpi_root,
NULL, ACPI_BUS_TYPE_SLEEP_BUTTON);
+ if (!result)
+ result = acpi_start_single_object(device);
+ }
return_VALUE(result);
}
@@ -1346,6 +1415,7 @@ acpi_bus_scan_fixed (
static int __init acpi_scan_init(void)
{
int result;
+ struct acpi_bus_ops ops;
ACPI_FUNCTION_TRACE("acpi_scan_init");
@@ -1357,17 +1427,23 @@ static int __init acpi_scan_init(void)
/*
* Create the root device in the bus's device tree
*/
- result = acpi_bus_add(&acpi_root, NULL, ACPI_ROOT_OBJECT,
+ result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT,
ACPI_BUS_TYPE_SYSTEM);
if (result)
goto Done;
+ result = acpi_start_single_object(acpi_root);
+
/*
* Enumerate devices in the ACPI namespace.
*/
result = acpi_bus_scan_fixed(acpi_root);
- if (!result)
- result = acpi_bus_scan(acpi_root);
+ if (!result) {
+ memset(&ops, 0, sizeof(ops));
+ ops.acpi_op_add = 1;
+ ops.acpi_op_start = 1;
+ result = acpi_bus_scan(acpi_root, &ops);
+ }
if (result)
acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);