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Commit 9ee85241 authored by Zhang Rui's avatar Zhang Rui Committed by Len Brown
Browse files

ACPI: create notifier chain to get hotkey events to graphics driver 



Kernel mode graphics drivers need this ACPI notifier chaine
so that they can get notified upon hotkey events.

Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent ba5e1223

drivers/acpi/event.c

+28 −0
Original line number Diff line number Diff line
@@ -109,6 +109,34 @@ static const struct file_operations acpi_system_event_ops = { 
};

#endif	/* CONFIG_ACPI_PROC_EVENT */



/* ACPI notifier chain */

BLOCKING_NOTIFIER_HEAD(acpi_chain_head);



int acpi_notifier_call_chain(struct acpi_device *dev, u32 type, u32 data)

{

	struct acpi_bus_event event;



	strcpy(event.device_class, dev->pnp.device_class);

	strcpy(event.bus_id, dev->pnp.bus_id);

	event.type = type;

	event.data = data;

	return (blocking_notifier_call_chain(&acpi_chain_head, 0, (void *)&event)

                        == NOTIFY_BAD) ? -EINVAL : 0;

}

EXPORT_SYMBOL(acpi_notifier_call_chain);



int register_acpi_notifier(struct notifier_block *nb)

{

	return blocking_notifier_chain_register(&acpi_chain_head, nb);

}

EXPORT_SYMBOL(register_acpi_notifier);



int unregister_acpi_notifier(struct notifier_block *nb)

{

	return blocking_notifier_chain_unregister(&acpi_chain_head, nb);

}

EXPORT_SYMBOL(unregister_acpi_notifier);



#ifdef CONFIG_NET

static unsigned int acpi_event_seqnum;

struct acpi_genl_event {

include/acpi/acpi_bus.h

+3 −0
Original line number Diff line number Diff line
@@ -321,6 +321,9 @@ struct acpi_bus_event { 


extern struct kobject *acpi_kobj;

extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);

extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);

extern int register_acpi_notifier(struct notifier_block *);

extern int unregister_acpi_notifier(struct notifier_block *);

/*

 * External Functions

 */