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authorIngo Molnar <mingo@elte.hu>2009-09-07 08:19:51 +0200
committerIngo Molnar <mingo@elte.hu>2009-09-07 08:19:51 +0200
commita1922ed661ab2c1637d0b10cde933bd9cd33d965 (patch)
tree0f1777542b385ebefd30b3586d830fd8ed6fda5b /drivers/acpi/bus.c
parent75e33751ca8bbb72dd6f1a74d2810ddc8cbe4bdf (diff)
parentd28daf923ac5e4a0d7cecebae56f3e339189366b (diff)
downloadlinux-2.6.38-lt-ux500-a1922ed661ab2c1637d0b10cde933bd9cd33d965.tar.gz
Merge branch 'tracing/core' into tracing/hw-breakpoints
Conflicts: arch/Kconfig kernel/trace/trace.h Merge reason: resolve the conflicts, plus adopt to the new ring-buffer APIs. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/acpi/bus.c')
-rw-r--r--drivers/acpi/bus.c91
1 files changed, 24 insertions, 67 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index ae862f1798d..2876fc70c3a 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -450,18 +450,16 @@ int acpi_bus_receive_event(struct acpi_bus_event *event)
Notification Handling
-------------------------------------------------------------------------- */
-static int
-acpi_bus_check_device(struct acpi_device *device, int *status_changed)
+static void acpi_bus_check_device(acpi_handle handle)
{
- acpi_status status = 0;
+ struct acpi_device *device;
+ acpi_status status;
struct acpi_device_status old_status;
-
+ if (acpi_bus_get_device(handle, &device))
+ return;
if (!device)
- return -EINVAL;
-
- if (status_changed)
- *status_changed = 0;
+ return;
old_status = device->status;
@@ -471,22 +469,15 @@ acpi_bus_check_device(struct acpi_device *device, int *status_changed)
*/
if (device->parent && !device->parent->status.present) {
device->status = device->parent->status;
- if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) {
- if (status_changed)
- *status_changed = 1;
- }
- return 0;
+ return;
}
status = acpi_bus_get_status(device);
if (ACPI_FAILURE(status))
- return -ENODEV;
+ return;
if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
- return 0;
-
- if (status_changed)
- *status_changed = 1;
+ return;
/*
* Device Insertion/Removal
@@ -498,33 +489,17 @@ acpi_bus_check_device(struct acpi_device *device, int *status_changed)
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
/* TBD: Handle device removal */
}
-
- return 0;
}
-static int acpi_bus_check_scope(struct acpi_device *device)
+static void acpi_bus_check_scope(acpi_handle handle)
{
- int result = 0;
- int status_changed = 0;
-
-
- if (!device)
- return -EINVAL;
-
/* Status Change? */
- result = acpi_bus_check_device(device, &status_changed);
- if (result)
- return result;
-
- if (!status_changed)
- return 0;
+ acpi_bus_check_device(handle);
/*
* TBD: Enumerate child devices within this device's scope and
* run acpi_bus_check_device()'s on them.
*/
-
- return 0;
}
static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
@@ -547,22 +522,19 @@ EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
*/
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
{
- int result = 0;
struct acpi_device *device = NULL;
+ struct acpi_driver *driver;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
+ type, handle));
blocking_notifier_call_chain(&acpi_bus_notify_list,
type, (void *)handle);
- if (acpi_bus_get_device(handle, &device))
- return;
-
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Received BUS CHECK notification for device [%s]\n",
- device->pnp.bus_id));
- result = acpi_bus_check_scope(device);
+ acpi_bus_check_scope(handle);
/*
* TBD: We'll need to outsource certain events to non-ACPI
* drivers via the device manager (device.c).
@@ -570,10 +542,7 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
break;
case ACPI_NOTIFY_DEVICE_CHECK:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Received DEVICE CHECK notification for device [%s]\n",
- device->pnp.bus_id));
- result = acpi_bus_check_device(device, NULL);
+ acpi_bus_check_device(handle);
/*
* TBD: We'll need to outsource certain events to non-ACPI
* drivers via the device manager (device.c).
@@ -581,44 +550,26 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
break;
case ACPI_NOTIFY_DEVICE_WAKE:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Received DEVICE WAKE notification for device [%s]\n",
- device->pnp.bus_id));
/* TBD */
break;
case ACPI_NOTIFY_EJECT_REQUEST:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Received EJECT REQUEST notification for device [%s]\n",
- device->pnp.bus_id));
/* TBD */
break;
case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Received DEVICE CHECK LIGHT notification for device [%s]\n",
- device->pnp.bus_id));
/* TBD: Exactly what does 'light' mean? */
break;
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Received FREQUENCY MISMATCH notification for device [%s]\n",
- device->pnp.bus_id));
/* TBD */
break;
case ACPI_NOTIFY_BUS_MODE_MISMATCH:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Received BUS MODE MISMATCH notification for device [%s]\n",
- device->pnp.bus_id));
/* TBD */
break;
case ACPI_NOTIFY_POWER_FAULT:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Received POWER FAULT notification for device [%s]\n",
- device->pnp.bus_id));
/* TBD */
break;
@@ -629,7 +580,13 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
break;
}
- return;
+ acpi_bus_get_device(handle, &device);
+ if (device) {
+ driver = device->driver;
+ if (driver && driver->ops.notify &&
+ (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
+ driver->ops.notify(device, type);
+ }
}
/* --------------------------------------------------------------------------