4.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
commit e5b5a61fcb3743f1dacf9e20d28f48423cecf0c1 upstream.
Devices found by class_find_device must be freed with put_device().
Otherwise the reference count will not work properly.
Fixes: a96aa64cb572 ("leds/led-class: Handle LEDs with the same name")
Reported-by: Alan Tull <delicious.quinoa@xxxxxxxxx>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/leds/led-class.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -228,12 +228,15 @@ static int led_classdev_next_name(const
{
unsigned int i = 0;
int ret = 0;
+ struct device *dev;
strlcpy(name, init_name, len);
- while (class_find_device(leds_class, NULL, name, match_name) &&
- (ret < len))
+ while ((ret < len) &&
+ (dev = class_find_device(leds_class, NULL, name, match_name))) {
+ put_device(dev);
ret = snprintf(name, len, "%s_%u", init_name, ++i);
+ }
if (ret >= len)
return -ENOMEM;
--
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