[PATCH -next] leds: cht-wcove: Fix an unsigned comparison which can never be negative

[Yang Li <yang.lee@linux.alibaba.com>]

The return value from the call to cht_wc_leds_find_freq() is int.
However, the return value is being assigned to an unsigned
int variable 'ctrl', so making it an int.

Eliminate the following warning:
drivers/leds/leds-cht-wcove.c:236 cht_wc_leds_set_effect() warn: unsigned 'ctrl' is never less than zero.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=5341
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
---
 drivers/leds/leds-cht-wcove.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/leds/leds-cht-wcove.c b/drivers/leds/leds-cht-wcove.c
index 0cfebee98910..10afd03164b4 100644
--- a/drivers/leds/leds-cht-wcove.c
+++ b/drivers/leds/leds-cht-wcove.c
@@ -223,8 +223,7 @@ static int cht_wc_leds_set_effect(struct led_classdev *cdev,
 				  u8 effect)
 {
 	struct cht_wc_led *led = container_of(cdev, struct cht_wc_led, cdev);
-	unsigned int ctrl;
-	int ret;
+	int ctrl, ret;
 
 	mutex_lock(&led->mutex);
 
-- 
2.20.1.7.g153144c