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authorFabio Baltieri <fabio.baltieri@gmail.com>2012-11-04 01:54:34 -0800
committerBryan Wu <cooloney@gmail.com>2012-11-26 14:28:50 -0800
commita8df7b1ab70bfd6f261fa5e96985fca638299acc (patch)
tree92e50e11054d9182757899e9c16070dbffadc83b /drivers/leds/led-triggers.c
parent5cce0105c8d07d3bd5f578c77d273e1a1e09f157 (diff)
downloadop-kernel-dev-a8df7b1ab70bfd6f261fa5e96985fca638299acc.zip
op-kernel-dev-a8df7b1ab70bfd6f261fa5e96985fca638299acc.tar.gz
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/leds/led-triggers.c')
-rw-r--r--drivers/leds/led-triggers.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index 262eb41..a4fa4bf 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)
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