The internal check_fb callback from struct pwm_bl_data is never
implemented. The driver's implementation of check_fb always
returns true, which is the backlight core's default if no
implementation has been set. So remove the code from the driver.

v2:
        * reword commit message

Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: "Uwe Kleine-König" <u.kleine-koe...@pengutronix.de>
Acked-by: Uwe Kleine-König <u.kleine-koe...@pengutronix.de>
Reviewed-by: Daniel Thompson <daniel.thomp...@linaro.org>
Reviewed-by: Javier Martinez Canillas <javi...@redhat.com>
---
 drivers/video/backlight/pwm_bl.c | 12 ------------
 include/linux/pwm_backlight.h    |  1 -
 2 files changed, 13 deletions(-)

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index ffcebf6aa76a9..61d30bc98eea5 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -11,7 +11,6 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
-#include <linux/fb.h>
 #include <linux/backlight.h>
 #include <linux/err.h>
 #include <linux/pwm.h>
@@ -34,7 +33,6 @@ struct pwm_bl_data {
                                          int brightness);
        void                    (*notify_after)(struct device *,
                                        int brightness);
-       int                     (*check_fb)(struct device *, struct fb_info *);
        void                    (*exit)(struct device *);
 };
 
@@ -129,17 +127,8 @@ static int pwm_backlight_update_status(struct 
backlight_device *bl)
        return 0;
 }
 
-static int pwm_backlight_check_fb(struct backlight_device *bl,
-                                 struct fb_info *info)
-{
-       struct pwm_bl_data *pb = bl_get_data(bl);
-
-       return !pb->check_fb || pb->check_fb(pb->dev, info);
-}
-
 static const struct backlight_ops pwm_backlight_ops = {
        .update_status  = pwm_backlight_update_status,
-       .check_fb       = pwm_backlight_check_fb,
 };
 
 #ifdef CONFIG_OF
@@ -482,7 +471,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 
        pb->notify = data->notify;
        pb->notify_after = data->notify_after;
-       pb->check_fb = data->check_fb;
        pb->exit = data->exit;
        pb->dev = &pdev->dev;
        pb->enabled = false;
diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
index cdd2ac366bc72..0bf80e98d5b40 100644
--- a/include/linux/pwm_backlight.h
+++ b/include/linux/pwm_backlight.h
@@ -19,7 +19,6 @@ struct platform_pwm_backlight_data {
        int (*notify)(struct device *dev, int brightness);
        void (*notify_after)(struct device *dev, int brightness);
        void (*exit)(struct device *dev);
-       int (*check_fb)(struct device *dev, struct fb_info *info);
 };
 
 #endif
-- 
2.44.0

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