diff options
| author | Fabio Baltieri <fabio.baltieri@gmail.com> | 2012-11-04 10:54:34 +0100 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2012-11-26 23:28:50 +0100 |
| commit | a8df7b1ab70bfd6f261fa5e96985fca638299acc (patch) | |
| tree | 92e50e11054d9182757899e9c16070dbffadc83b /drivers | |
| parent | leds: lm3642: Fix up world writable sysfs files (diff) | |
| download | linux-a8df7b1ab70bfd6f261fa5e96985fca638299acc.tar.xz linux-a8df7b1ab70bfd6f261fa5e96985fca638299acc.zip | |
leds: add led_trigger_rename function
Implements a "led_trigger_rename" function to rename a trigger with
proper locking.
This assumes that led name was originally allocated in non-constant
storage.
Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
Cc: Kurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/leds/led-triggers.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c index 262eb4193710..a4fa4bf02d53 100644 --- a/drivers/leds/led-triggers.c +++ b/drivers/leds/led-triggers.c @@ -166,6 +166,19 @@ void led_trigger_set_default(struct led_classdev *led_cdev) } EXPORT_SYMBOL_GPL(led_trigger_set_default); +void led_trigger_rename_static(const char *name, struct led_trigger *trig) +{ + /* new name must be on a temporary string to prevent races */ + BUG_ON(name == trig->name); + + down_write(&triggers_list_lock); + /* this assumes that trig->name was originaly allocated to + * non constant storage */ + strcpy((char *)trig->name, name); + up_write(&triggers_list_lock); +} +EXPORT_SYMBOL_GPL(led_trigger_rename_static); + /* LED Trigger Interface */ int led_trigger_register(struct led_trigger *trig) |