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 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: backlight-lcd-fix-race-condition-during-register.patch and it can be found in the queue-4.4 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 12:02:55 CET 2017
From: Uwe Kleine-König 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-König 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-4.4/backlight-lcd-fix-race-condition-during-register.patch