Patch "backlight: lcd: Fix race condition during register" has been added to the 3.18-stable tree

Patch "backlight: lcd: Fix race condition during register" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    backlight: lcd: Fix race condition during register

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     backlight-lcd-fix-race-condition-during-register.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Sun Nov 19 12:16:40 CET 2017
From: Uwe Kleine-K�nig <u.kleine-koenig@pengutronix.de>
Date: Wed, 6 Jul 2016 19:33:05 +0200
Subject: backlight: lcd: Fix race condition during register

From: Uwe Kleine-K�nig <u.kleine-koenig@pengutronix.de>


[ Upstream commit cc21942bce652d1a92dae85b785378256e1df1f7 ]

Once device_register is called for a device its attributes might be
accessed. As the callbacks of a lcd device's attributes make use of the
lcd_ops, the respective member must be setup before calling
device_register.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/video/backlight/lcd.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -226,6 +226,8 @@ struct lcd_device *lcd_device_register(c
 	dev_set_name(&new_ld->dev, "%s", name);
 	dev_set_drvdata(&new_ld->dev, devdata);
 
+	new_ld->ops = ops;
+
 	rc = device_register(&new_ld->dev);
 	if (rc) {
 		put_device(&new_ld->dev);
@@ -238,8 +240,6 @@ struct lcd_device *lcd_device_register(c
 		return ERR_PTR(rc);
 	}
 
-	new_ld->ops = ops;
-
 	return new_ld;
 }
 EXPORT_SYMBOL(lcd_device_register);


Patches currently in stable-queue which might be from u.kleine-koenig@pengutronix.de are

queue-3.18/backlight-lcd-fix-race-condition-during-register.patch