linux-kernel - [PATCH] backlight: pwm_bl: Remove unneeded checks for valid GPIOs

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Message-Id: <00be8237e0e2bc9b179177b5490f175d657261a2.1684856337.git.geert+renesas@glider.be>
Date:   Tue, 23 May 2023 17:40:41 +0200
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Lee Jones <lee@...nel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
Cc:     linux-pwm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] backlight: pwm_bl: Remove unneeded checks for valid GPIOs

All of gpiod_set_value_cansleep() and gpiod_direction_output() handle
NULL GPIO pointers just fine, so there is no need to check for that in
the caller.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
 drivers/video/backlight/pwm_bl.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index fce412234d10399a..a51fbab96368053b 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -54,8 +54,7 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb)
 	if (pb->post_pwm_on_delay)
 		msleep(pb->post_pwm_on_delay);
 
-	if (pb->enable_gpio)
-		gpiod_set_value_cansleep(pb->enable_gpio, 1);
+	gpiod_set_value_cansleep(pb->enable_gpio, 1);
 
 	pb->enabled = true;
 }
@@ -65,8 +64,7 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb)
 	if (!pb->enabled)
 		return;
 
-	if (pb->enable_gpio)
-		gpiod_set_value_cansleep(pb->enable_gpio, 0);
+	gpiod_set_value_cansleep(pb->enable_gpio, 0);
 
 	if (pb->pwm_off_delay)
 		msleep(pb->pwm_off_delay);
@@ -429,8 +427,7 @@ static int pwm_backlight_initial_power_state(const struct pwm_bl_data *pb)
 	 * Synchronize the enable_gpio with the observed state of the
 	 * hardware.
 	 */
-	if (pb->enable_gpio)
-		gpiod_direction_output(pb->enable_gpio, active);
+	gpiod_direction_output(pb->enable_gpio, active);
 
 	/*
 	 * Do not change pb->enabled here! pb->enabled essentially
-- 
2.34.1