Re: [PATCH v3 01/11] driver: platform: Add helper for safer setting of driver_override

[Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>]

On 28/02/2022 21:03, Bjorn Helgaas wrote:
> On Sun, Feb 27, 2022 at 02:52:04PM +0100, Krzysztof Kozlowski wrote:
>> Several core drivers and buses expect that driver_override is a
>> dynamically allocated memory thus later they can kfree() it.
> 
>> +int driver_set_override(struct device *dev, const char **override,
>> +			const char *s, size_t len)
>> +{
>> +	const char *new, *old;
>> +	char *cp;
>> +
>> +	if (!dev || !override || !s)
>> +		return -EINVAL;
>> +
>> +	/* We need to keep extra room for a newline */
> 
> It would help a lot to extend this comment with a hint about where the
> room for a newline is needed.  It was confusing even before, but it's
> much more so now that the check is in a completely different file than
> the "show" functions that need the space.
> 

Indeed, this needs explanation.


Best regards,
Krzysztof