[PATCH -next] backlight: gpio_backlight: Switch to use dev_err_probe() helper

[Yang Yingliang]

On 2022/9/26 21:46, Daniel Thompson wrote:
> On Mon, Sep 26, 2022 at 09:38:19PM +0800, Yang Yingliang wrote:
>> 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.
> Needs an SoB.
>
>
>> ---
>>   drivers/video/backlight/gpio_backlight.c | 10 +++-------
>>   1 file changed, 3 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c
>> index 6f78d928f054..4ff3939e5f7e 100644
>> --- a/drivers/video/backlight/gpio_backlight.c
>> +++ b/drivers/video/backlight/gpio_backlight.c
>> @@ -64,13 +64,9 @@ static int gpio_backlight_probe(struct platform_device *pdev)
>>   	def_value = device_property_read_bool(dev, "default-on");
>>
>>   	gbl->gpiod = devm_gpiod_get(dev, NULL, GPIOD_ASIS);
>> -	if (IS_ERR(gbl->gpiod)) {
>> -		ret = PTR_ERR(gbl->gpiod);
>> -		if (ret != -EPROBE_DEFER)
>> -			dev_err(dev,
>> -				"Error: The gpios parameter is missing or invalid.\n");
>> -		return ret;
>> -	}
>> +	if (IS_ERR(gbl->gpiod))
>> +		return dev_err_probe(dev, PTR_ERR(gbl->gpiod),
>> +				     "Error: The gpios parameter is missing or invalid.\n");
> Remove the "Error: The " from the beginning of the string:
> dev_err_probe() adds an error tag and the resulting line will read
> better with a "The " at the beginning.
OK.

Thanks,
Yang
>
>
> Daniel.
> .