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From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Lee Jones <lee.jones@linaro.org>,
	Daniel Thompson <daniel.thompson@linaro.org>,
	Jingoo Han <jingoohan1@gmail.com>
Cc: linux-fbdev@vger.kernel.org,
	Thierry Reding <thierry.reding@gmail.com>,
	dri-devel@lists.freedesktop.org, kernel@pengutronix.de
Subject: [PATCH v3 1/2] backlight: lm3630a: fix return code of .update_status() callback
Date: Mon, 21 Jun 2021 14:21:47 +0200	[thread overview]
Message-ID: <20210621122148.116863-2-u.kleine-koenig@pengutronix.de> (raw)
In-Reply-To: <20210621122148.116863-1-u.kleine-koenig@pengutronix.de>

According to <linux/backlight.h> .update_status() is supposed to
return 0 on success and a negative error code otherwise. Adapt
lm3630a_bank_a_update_status() and lm3630a_bank_b_update_status() to
actually do it.

While touching that also add the error code to the failure message.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/video/backlight/lm3630a_bl.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/video/backlight/lm3630a_bl.c b/drivers/video/backlight/lm3630a_bl.c
index e88a2b0e5904..7140b0d98082 100644
--- a/drivers/video/backlight/lm3630a_bl.c
+++ b/drivers/video/backlight/lm3630a_bl.c
@@ -190,7 +190,7 @@ static int lm3630a_bank_a_update_status(struct backlight_device *bl)
 	if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0) {
 		lm3630a_pwm_ctrl(pchip, bl->props.brightness,
 				 bl->props.max_brightness);
-		return bl->props.brightness;
+		return 0;
 	}
 
 	/* disable sleep */
@@ -210,8 +210,8 @@ static int lm3630a_bank_a_update_status(struct backlight_device *bl)
 	return 0;
 
 out_i2c_err:
-	dev_err(pchip->dev, "i2c failed to access\n");
-	return bl->props.brightness;
+	dev_err(pchip->dev, "i2c failed to access (%pe)\n", ERR_PTR(ret));
+	return ret;
 }
 
 static int lm3630a_bank_a_get_brightness(struct backlight_device *bl)
@@ -267,7 +267,7 @@ static int lm3630a_bank_b_update_status(struct backlight_device *bl)
 	if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0) {
 		lm3630a_pwm_ctrl(pchip, bl->props.brightness,
 				 bl->props.max_brightness);
-		return bl->props.brightness;
+		return 0;
 	}
 
 	/* disable sleep */
@@ -287,8 +287,8 @@ static int lm3630a_bank_b_update_status(struct backlight_device *bl)
 	return 0;
 
 out_i2c_err:
-	dev_err(pchip->dev, "i2c failed to access REG_CTRL\n");
-	return bl->props.brightness;
+	dev_err(pchip->dev, "i2c failed to access (%pe)\n", ERR_PTR(ret));
+	return ret;
 }
 
 static int lm3630a_bank_b_get_brightness(struct backlight_device *bl)
-- 
2.30.2


  reply	other threads:[~2021-06-21 12:22 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-21 12:21 [PATCH v3 0/2] backlight: lm3630a: convert to atomic PWM API Uwe Kleine-König
2021-06-21 12:21 ` Uwe Kleine-König [this message]
2021-06-21 13:06   ` [PATCH v3 1/2] backlight: lm3630a: fix return code of .update_status() callback Daniel Thompson
2021-06-22 13:11   ` Lee Jones
2021-06-21 12:21 ` [PATCH v3 2/2] backlight: lm3630a: convert to atomic PWM API and check for errors Uwe Kleine-König
2021-06-21 13:14   ` Daniel Thompson
2021-06-22 13:12   ` Lee Jones
2021-06-24 20:10     ` Uwe Kleine-König
2021-06-25  8:44       ` Lee Jones

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