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ACPI: Add acpi_bus_attach_private_data() to attach data to ACPI handle

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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: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lan Tianyu 2014-05-20 20:59:21 +08:00 • committed by Rafael J. Wysocki
parent c7208164e6
commit 72013795a7
2 changed files with 26 additions and 4 deletions
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28
drivers/acpi/bus.c
View file

@ -132,6 +132,21 @@ void acpi_bus_private_data_handler(acpi_handle handle,
} }
EXPORT_SYMBOL(acpi_bus_private_data_handler); 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) int acpi_bus_get_private_data(acpi_handle handle, void **data)
{ {
acpi_status status; acpi_status status;
@ -140,15 +155,20 @@ int acpi_bus_get_private_data(acpi_handle handle, void **data)
return -EINVAL; return -EINVAL;
status = acpi_get_data(handle, acpi_bus_private_data_handler, data); status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
if (ACPI_FAILURE(status) || !*data) { if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", acpi_handle_debug(handle, "No context for object\n");
handle));
return -ENODEV; return -ENODEV;
} }
return 0; 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) void acpi_bus_no_hotplug(acpi_handle handle)
{ {

2
include/acpi/acpi_bus.h
View file

@ -406,6 +406,8 @@ extern struct kobject *acpi_kobj;
extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int); extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
void acpi_bus_private_data_handler(acpi_handle, void *); void acpi_bus_private_data_handler(acpi_handle, void *);
int acpi_bus_get_private_data(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); void acpi_bus_no_hotplug(acpi_handle handle);
extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32); extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
extern int register_acpi_notifier(struct notifier_block *); extern int register_acpi_notifier(struct notifier_block *);