[-next,1/5] Input: da7280 - 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.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/input/misc/da7280.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

Hi Yang,

Thank you for your series,

On Tue, Sep 20, 2022 at 23:36, Yang Yingliang <yangyingliang@huawei.com> 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.
>
> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
> ---
>  drivers/input/misc/da7280.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/input/misc/da7280.c b/drivers/input/misc/da7280.c
> index b08610d6e575..b1ca4fd94e9e 100644
> --- a/drivers/input/misc/da7280.c
> +++ b/drivers/input/misc/da7280.c
> @@ -1166,12 +1166,9 @@ static int da7280_probe(struct i2c_client *client,
>  	if (haptics->const_op_mode == DA7280_PWM_MODE) {
>  		haptics->pwm_dev = devm_pwm_get(dev, NULL);
>  		error = PTR_ERR_OR_ZERO(haptics->pwm_dev);
> -		if (error) {
> -			if (error != -EPROBE_DEFER)
> -				dev_err(dev, "Unable to request PWM: %d\n",
> -					error);
> -			return error;
> -		}
> +		if (error)
> +			return dev_err_probe(dev, error,
> +					     "Unable to request PWM\n");

For the whole series:

If we look at the input tree, we can see that there is no occurence of
dev_err_probe():

$ ~/src/linux/drivers/input/ 483fed3b5dc8 grep -rsn dev_err_probe
$ ~/src/linux/drivers/input/ 483fed3b5dc8

The reason for this is that the input maintainer (Dmitry) dislikes
dev_err_probe() as he stated in [1]

So I don't think he will apply this.

Regards,
Mattijs

[1] https://lore.kernel.org/r/YWTpg35wyYS1uoFZ@google.com

>
>  		/* Sync up PWM state and ensure it is off. */
>  		pwm_init_state(haptics->pwm_dev, &state);
> -- 
> 2.25.1

Hi Mattijs,

On 2022/9/22 16:51, Mattijs Korpershoek wrote:
> Hi Yang,
>
> Thank you for your series,
>
> On Tue, Sep 20, 2022 at 23:36, Yang Yingliang <yangyingliang@huawei.com> 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.
>>
>> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
>> ---
>>   drivers/input/misc/da7280.c | 9 +++------
>>   1 file changed, 3 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/input/misc/da7280.c b/drivers/input/misc/da7280.c
>> index b08610d6e575..b1ca4fd94e9e 100644
>> --- a/drivers/input/misc/da7280.c
>> +++ b/drivers/input/misc/da7280.c
>> @@ -1166,12 +1166,9 @@ static int da7280_probe(struct i2c_client *client,
>>   	if (haptics->const_op_mode == DA7280_PWM_MODE) {
>>   		haptics->pwm_dev = devm_pwm_get(dev, NULL);
>>   		error = PTR_ERR_OR_ZERO(haptics->pwm_dev);
>> -		if (error) {
>> -			if (error != -EPROBE_DEFER)
>> -				dev_err(dev, "Unable to request PWM: %d\n",
>> -					error);
>> -			return error;
>> -		}
>> +		if (error)
>> +			return dev_err_probe(dev, error,
>> +					     "Unable to request PWM\n");
> For the whole series:
>
> If we look at the input tree, we can see that there is no occurence of
> dev_err_probe():
>
> $ ~/src/linux/drivers/input/ 483fed3b5dc8 grep -rsn dev_err_probe
> $ ~/src/linux/drivers/input/ 483fed3b5dc8
>
> The reason for this is that the input maintainer (Dmitry) dislikes
> dev_err_probe() as he stated in [1]
>
> So I don't think he will apply this.

OK, thanks for replying and mentioning it.

>
> Regards,
> Mattijs
>
> [1] https://lore.kernel.org/r/YWTpg35wyYS1uoFZ@google.com
>
>>   		/* Sync up PWM state and ensure it is off. */
>>   		pwm_init_state(haptics->pwm_dev, &state);
>> -- 
>> 2.25.1
> .