linux-kernel - [PATCH 4.9 007/177] led: core: Clear LED_BLINK_SW flag in led_blink

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Date:   Fri, 23 Mar 2018 10:52:15 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        "linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org, pavel@....cz,
        jacek.anaszewski@...il.com, Matthieu CASTET" 
        <matthieu.castet@...rot.com>
Subject: [PATCH 4.9 007/177] led: core: Clear LED_BLINK_SW flag in led_blink_set()

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jacek Anaszewski <jacek.anaszewski@...il.com>

[Only needed in 4.9.y due to other fixes in mainline - gregkh]

With the current code, the following sequence won't work :
echo timer > trigger

echo 0 >  delay_off
* at this point we call
** led_delay_off_store
** led_blink_set
---
 drivers/leds/led-core.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/leds/led-core.c
+++ b/drivers/leds/led-core.c
@@ -188,6 +188,7 @@ void led_blink_set(struct led_classdev *
 {
 	del_timer_sync(&led_cdev->blink_timer);
 
+	led_cdev->flags &= ~LED_BLINK_SW;
 	led_cdev->flags &= ~LED_BLINK_ONESHOT;
 	led_cdev->flags &= ~LED_BLINK_ONESHOT_STOP;