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ACPI: use handle, not device, in system notification path

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This patch changes the global system notification path so it uses the
acpi_handle, not the acpi_device.

System notifications often deal with device presence and status change.
In these cases, we may not have an acpi_device.  For example, we may
get a Device Check notification on an object that previously was not
present.  Since the object was not present, we would not have had an
acpi_device for it.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2009-05-22 11:43:56 -06:00 committed by Len Brown
parent cdd5b8ca12
commit ff754e2e85
1 changed files with 15 additions and 15 deletions
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30
drivers/acpi/bus.c
View file

@ -450,11 +450,14 @@ int acpi_bus_receive_event(struct acpi_bus_event *event)
Notification Handling
-------------------------------------------------------------------------- */
static void acpi_bus_check_device(struct acpi_device *device)
static void acpi_bus_check_device(acpi_handle handle)
{
struct acpi_device *device;
acpi_status status;
struct acpi_device_status old_status;
if (acpi_bus_get_device(handle, &device))
return;
if (!device)
return;
@ -488,13 +491,10 @@ static void acpi_bus_check_device(struct acpi_device *device)
}
}
static void acpi_bus_check_scope(struct acpi_device *device)
static void acpi_bus_check_scope(acpi_handle handle)
{
if (!device)
return;
/* Status Change? */
acpi_bus_check_device(device);
acpi_bus_check_device(handle);
/*
* TBD: Enumerate child devices within this device's scope and
@ -531,13 +531,10 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
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_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).
@ -545,7 +542,7 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
break;
case ACPI_NOTIFY_DEVICE_CHECK:
acpi_bus_check_device(device);
acpi_bus_check_device(handle);
/*
* TBD: We'll need to outsource certain events to non-ACPI
* drivers via the device manager (device.c).
@ -583,10 +580,13 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
break;
}
driver = device->driver;
if (driver && driver->ops.notify &&
(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
driver->ops.notify(device, type);
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);
}
}
/* --------------------------------------------------------------------------