Re: [PATCH 3/4] hwmon: Add support for Amphenol ChipCap 2

[Krzysztof Kozlowski]

On 08/11/2023 17:35, Javier Carrasco wrote:
>>> +
>>> +	data->regulator = devm_regulator_get_optional(dev, "vdd");
>>> +	if (!IS_ERR(data->regulator)) {
>>> +		ret = cc2_retrive_alarm_config(data);
>>> +		if (ret)
>>> +			goto cleanup;
>>> +	} else {
>>> +		/* No access to EEPROM without regulator: no alarm control */
>>
>> Test your code with deferred probe. Are you sure you handle it
>> correctly? To me, it looks like you handle deferred probe the same as
>> any error.
>>
> The -EPROBE_DEFER is propagated to the probe function and it is the
> returned value. I clarified the error path in v2 so no error messages

Really?

I see:
if (!IS_ERR(data->regulator)) {
	// so you do not go here
} else {
	goto dev_register;
}
dev_register is not error path. So how do you return EPROBE_DEFER?

Which line of code does it?

> are displayed in that case, going directly to the dev_err_probe in the
> probe cleanup.
> When the EPROBE_DEFER error is returned, the probe function is deferred
> and called again later on, which is the desired behavior.
> 


Best regards,
Krzysztof