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Commit 72013795 authored by Lan Tianyu's avatar Lan Tianyu Committed by Rafael J. Wysocki
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ACPI: Add acpi_bus_attach_private_data() to attach data to ACPI handle 



There is already acpi_bus_get_private_data() to get ACPI handle data
which is associated with acpi_bus_private_data_handler(). This patch
is to add acpi_bus_attach_private_data() to make a pair and facilitate
to attach and get data to/from ACPI handle.

Reviewed-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarLan Tianyu <tianyu.lan@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent c7208164

drivers/acpi/bus.c

+24 −4
Original line number Diff line number Diff line
@@ -132,6 +132,21 @@ void acpi_bus_private_data_handler(acpi_handle handle, 
}

EXPORT_SYMBOL(acpi_bus_private_data_handler);



int acpi_bus_attach_private_data(acpi_handle handle, void *data)

{

	acpi_status status;



	status = acpi_attach_data(handle,

			acpi_bus_private_data_handler, data);

	if (ACPI_FAILURE(status)) {

		acpi_handle_debug(handle, "Error attaching device data\n");

		return -ENODEV;

	}



	return 0;

}

EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);



int acpi_bus_get_private_data(acpi_handle handle, void **data)

{

	acpi_status status;
@@ -140,15 +155,20 @@ int acpi_bus_get_private_data(acpi_handle handle, void **data) 
		return -EINVAL;



	status = acpi_get_data(handle, acpi_bus_private_data_handler, data);

	if (ACPI_FAILURE(status) || !*data) {

		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",

				handle));

	if (ACPI_FAILURE(status)) {

		acpi_handle_debug(handle, "No context for object\n");

		return -ENODEV;

	}



	return 0;

}

EXPORT_SYMBOL(acpi_bus_get_private_data);

EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);



void acpi_bus_detach_private_data(acpi_handle handle)

{

	acpi_detach_data(handle, acpi_bus_private_data_handler);

}

EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);



void acpi_bus_no_hotplug(acpi_handle handle)

{

include/acpi/acpi_bus.h

+2 −0
Original line number Diff line number Diff line
@@ -406,6 +406,8 @@ extern struct kobject *acpi_kobj; 
extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);

void acpi_bus_private_data_handler(acpi_handle, void *);

int acpi_bus_get_private_data(acpi_handle, void **);

int acpi_bus_attach_private_data(acpi_handle, void *);

void acpi_bus_detach_private_data(acpi_handle);

void acpi_bus_no_hotplug(acpi_handle handle);

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

extern int register_acpi_notifier(struct notifier_block *);