[PATCH 5.4 062/149] backlight: lm3630a: Fix return code of .update_status() callback

Greg Kroah-Hartman
2021-07-19T16:58:12Z

From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

[ Upstream commit b9481a667a90ec739995e85f91f3672ca44d6ffa ]

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>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 f03ffe2bb237..8096202fbe5d 100644
--- a/drivers/video/backlight/lm3630a_bl.c
+++ b/drivers/video/backlight/lm3630a_bl.c
@@ -188,7 +188,7 @@ 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 */
@@ -208,8 +208,8 @@ 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)
@@ -265,7 +265,7 @@ 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 */
@@ -285,8 +285,8 @@ 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