The driver sets struct fb_info.bl_dev to the correct backlight
device. Thus rely on the backlight core code to match backlight
and framebuffer devices, and remove the extra check_fb() function
from struct backlight_ops.

v3:
        * use 'check_fb()' in commit message (Andy)

Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: Robin van der Gracht <ro...@protonic.nl>
Acked-by: Robin van der Gracht <ro...@protonic.nl>
Acked-by: Andy Shevchenko <a...@kernel.org>
Reviewed-by: Javier Martinez Canillas <javi...@redhat.com>
---
 drivers/auxdisplay/ht16k33.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
index a90430b7d07ba..0a858db32486b 100644
--- a/drivers/auxdisplay/ht16k33.c
+++ b/drivers/auxdisplay/ht16k33.c
@@ -325,16 +325,8 @@ static int ht16k33_bl_update_status(struct 
backlight_device *bl)
        return ht16k33_brightness_set(priv, brightness);
 }
 
-static int ht16k33_bl_check_fb(struct backlight_device *bl, struct fb_info *fi)
-{
-       struct ht16k33_priv *priv = bl_get_data(bl);
-
-       return (fi == NULL) || (fi->par == priv);
-}
-
 static const struct backlight_ops ht16k33_bl_ops = {
        .update_status  = ht16k33_bl_update_status,
-       .check_fb       = ht16k33_bl_check_fb,
 };
 
 /*
-- 
2.44.0

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