4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thomas Zimmermann <tzimmermann@xxxxxxx>
commit 992bdddaabfba19bdc77c1c7a4977b2aa41ec891 upstream.
Struct bd6107_platform_data refers to a platform device within
the Linux device hierarchy. The test in bd6107_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)
Fixes: 67b43e590415 ("backlight: Add ROHM BD6107 backlight driver")
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Cc: Lee Jones <lee@xxxxxxxxxx>
Cc: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
Cc: Jingoo Han <jingoohan1@xxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v3.12+
Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
Reviewed-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Reviewed-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230613110953.24176-2-tzimmermann@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/video/backlight/bd6107.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/video/backlight/bd6107.c
+++ b/drivers/video/backlight/bd6107.c
@@ -110,7 +110,7 @@ static int bd6107_backlight_check_fb(str
{
struct bd6107 *bd = bl_get_data(backlight);
- return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->dev;
+ return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->device;
}
static const struct backlight_ops bd6107_backlight_ops = {
