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thermal: core: Add some new helper functions to free resources 

In order to easily free resources allocated by
'thermal_zone_create_device_groups()' we need 2 new helper functions.

The first one undoes 'thermal_zone_create_device_groups()'.
The 2nd one undoes 'create_trip_attrs()', which is a function called by
'thermal_zone_create_device_groups()'.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Christophe Jaillet 2017-08-08 16:39:52 +02:00 committed by Zhang Rui
parent 039f6cf5b5
commit 32fa5ba317
2 changed files with 30 additions and 0 deletions
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1
drivers/thermal/thermal_core.h
View File

@ -71,6 +71,7 @@ int thermal_build_list_of_policies(char *buf);
/* sysfs I/F */
int thermal_zone_create_device_groups(struct thermal_zone_device *, int);
void thermal_zone_destroy_device_groups(struct thermal_zone_device *);
void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *);
/* used only at binding time */
ssize_t

29
drivers/thermal/thermal_sysfs.c
View File

@ -605,6 +605,24 @@ static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
return 0;
}
/**
* destroy_trip_attrs() - destroy attributes for trip points
* @tz: the thermal zone device
*
* helper function to free resources allocated by create_trip_attrs()
*/
static void destroy_trip_attrs(struct thermal_zone_device *tz)
{
if (!tz)
return;
kfree(tz->trip_type_attrs);
kfree(tz->trip_temp_attrs);
if (tz->ops->get_trip_hyst)
kfree(tz->trip_hyst_attrs);
kfree(tz->trips_attribute_group.attrs);
}
int thermal_zone_create_device_groups(struct thermal_zone_device *tz,
int mask)
{
@ -637,6 +655,17 @@ int thermal_zone_create_device_groups(struct thermal_zone_device *tz,
return 0;
}
void thermal_zone_destroy_device_groups(struct thermal_zone_device *tz)
{
if (!tz)
return;
if (tz->trips)
destroy_trip_attrs(tz);
kfree(tz->device.groups);
}
/* sys I/F for cooling device */
static ssize_t
thermal_cooling_device_type_show(struct device *dev,