This is a note to let you know that I've just added the patch titled
backlight/gpio_backlight: Compare against struct fb_info.device
to the 4.19-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-gpio_backlight-compare-against-struct-fb_info.device.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7b91d017f77c1bda56f27c2f4bbb70de7c6eca08 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@xxxxxxx>
Date: Tue, 13 Jun 2023 13:06:38 +0200
Subject: backlight/gpio_backlight: Compare against struct fb_info.device
From: Thomas Zimmermann <tzimmermann@xxxxxxx>
commit 7b91d017f77c1bda56f27c2f4bbb70de7c6eca08 upstream.
Struct gpio_backlight_platform_data refers to a platform device within
the Linux device hierarchy. The test in gpio_backlight_check_fb()
compares it against the fbdev device in struct fb_info.dev, which
is different. Fix the test by comparing to struct fb_info.device.
Fixes a bug in the backlight driver and prepares fbdev for making
struct fb_info.dev optional.
v2:
* move renames into separate patch (Javier, Sam, Michael)
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Fixes: 8b770e3c9824 ("backlight: Add GPIO-based backlight driver")
Cc: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Lee Jones <lee@xxxxxxxxxx>
Cc: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
Cc: Jingoo Han <jingoohan1@xxxxxxxxx>
Cc: linux-sh@xxxxxxxxxxxxxxx
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v3.12+
Reviewed-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Reviewed-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230613110953.24176-4-tzimmermann@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/video/backlight/gpio_backlight.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/video/backlight/gpio_backlight.c
+++ b/drivers/video/backlight/gpio_backlight.c
@@ -48,7 +48,7 @@ static int gpio_backlight_check_fb(struc
{
struct gpio_backlight *gbl = bl_get_data(bl);
- return gbl->fbdev == NULL || gbl->fbdev == info->dev;
+ return gbl->fbdev == NULL || gbl->fbdev == info->device;
}
static const struct backlight_ops gpio_backlight_ops = {
Patches currently in stable-queue which might be from tzimmermann@xxxxxxx are
queue-4.19/backlight-gpio_backlight-compare-against-struct-fb_info.device.patch
queue-4.19/backlight-lv5207lp-compare-against-struct-fb_info.device.patch
queue-4.19/backlight-bd6107-compare-against-struct-fb_info.device.patch
queue-4.19/drm-msm-replace-drm_framebuffer_-un-reference-with-p.patch
