ACPI: use handle, not device, in system notification path
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>
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@ -450,11 +450,14 @@ int acpi_bus_receive_event(struct acpi_bus_event *event)
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Notification Handling
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-------------------------------------------------------------------------- */
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static void acpi_bus_check_device(struct acpi_device *device)
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static void acpi_bus_check_device(acpi_handle handle)
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{
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struct acpi_device *device;
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acpi_status status;
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struct acpi_device_status old_status;
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if (acpi_bus_get_device(handle, &device))
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return;
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if (!device)
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return;
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@ -488,13 +491,10 @@ static void acpi_bus_check_device(struct acpi_device *device)
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}
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}
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static void acpi_bus_check_scope(struct acpi_device *device)
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static void acpi_bus_check_scope(acpi_handle handle)
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{
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if (!device)
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return;
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/* Status Change? */
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acpi_bus_check_device(device);
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acpi_bus_check_device(handle);
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/*
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* TBD: Enumerate child devices within this device's scope and
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@ -531,13 +531,10 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
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blocking_notifier_call_chain(&acpi_bus_notify_list,
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type, (void *)handle);
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if (acpi_bus_get_device(handle, &device))
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return;
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switch (type) {
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case ACPI_NOTIFY_BUS_CHECK:
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acpi_bus_check_scope(device);
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acpi_bus_check_scope(handle);
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/*
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* TBD: We'll need to outsource certain events to non-ACPI
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* drivers via the device manager (device.c).
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@ -545,7 +542,7 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
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break;
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case ACPI_NOTIFY_DEVICE_CHECK:
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acpi_bus_check_device(device);
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acpi_bus_check_device(handle);
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/*
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* TBD: We'll need to outsource certain events to non-ACPI
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* drivers via the device manager (device.c).
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@ -583,10 +580,13 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
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break;
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}
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driver = device->driver;
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if (driver && driver->ops.notify &&
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(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
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driver->ops.notify(device, type);
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acpi_bus_get_device(handle, &device);
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if (device) {
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driver = device->driver;
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if (driver && driver->ops.notify &&
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(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
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driver->ops.notify(device, type);
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}
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}
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/* --------------------------------------------------------------------------
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