linux-kernel - Re: [PATCH] regulator: scmi: Use int type to store negative error codes

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Message-ID: <20250829-marvellous-iguana-of-weather-4ab064@sudeepholla>
Date: Fri, 29 Aug 2025 11:25:27 +0100
From: Sudeep Holla <sudeep.holla@....com>
To: Qianfeng Rong <rongqianfeng@...o.com>
Cc: Cristian Marussi <cristian.marussi@....com>,
	Sudeep Holla <sudeep.holla@....com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, <arm-scmi@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] regulator: scmi: Use int type to store negative error
 codes

On Fri, Aug 29, 2025 at 06:14:11PM +0800, Qianfeng Rong wrote:
> Change the 'ret' variable from u32 to int to store negative error codes or
> zero returned by of_property_read_u32().
> 
> Storing the negative error codes in unsigned type, doesn't cause an issue
> at runtime but it's ugly as pants. Additionally, assigning negative error
> codes to unsigned type may trigger a GCC warning when the -Wsign-conversion
> flag is enabled.
> 
> No effect on runtime.
>

Reviewed-by: Sudeep Holla <sudeep.holla@....com>

Mark,

Not sure if it is worth adding:

Fixes: 0fbeae70ee7c ("regulator: add SCMI driver")

Especially if value > 0 is not treated as error in some driver using
regulator APIs.

-- 
Regards,
Sudeep