backlight: ktd253: Switch to use dev_err_probe() helper

In the probe path, dev_err() can be replaced with dev_err_probe()
which will check if error code is -EPROBE_DEFER and prints the
error name. It also sets the defer probe reason which can be
checked later through debugfs. It's more simple in error path.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20220926142059.2294282-1-yangyingliang@huawei.com

diff --git a/drivers/video/backlight/ktd253-backlight.c b/drivers/video/backlight/ktd253-backlight.c
index 37aa5a6..d7d4345 100644 (file)
--- a/drivers/video/backlight/ktd253-backlight.c
+++ b/drivers/video/backlight/ktd253-backlight.c
@@ -173,12 +173,9 @@ static int ktd253_backlight_probe(struct platform_device *pdev)
        }
 
        ktd253->gpiod = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
-       if (IS_ERR(ktd253->gpiod)) {
-               ret = PTR_ERR(ktd253->gpiod);
-               if (ret != -EPROBE_DEFER)
-                       dev_err(dev, "gpio line missing or invalid.\n");
-               return ret;
-       }
+       if (IS_ERR(ktd253->gpiod))
+               return dev_err_probe(dev, PTR_ERR(ktd253->gpiod),
+                                    "gpio line missing or invalid.\n");
        gpiod_set_consumer_name(ktd253->gpiod, dev_name(dev));
        /* Bring backlight to a known off state */
        msleep(KTD253_T_OFF_MS);