linux-kernel - Re: [PATCH] pinctrl: pinconf-generic: check error value EOPNOTSUPP

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Date: Thu, 4 Apr 2024 13:44:50 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: brgl@...ev.pl, linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
	cristian.marussi@....com, sudeep.holla@....com, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH] pinctrl: pinconf-generic: check error value EOPNOTSUPP

On Mon, Apr 1, 2024 at 4:02 PM Peng Fan (OSS) <peng.fan@....nxp.com> wrote:

> From: Peng Fan <peng.fan@....com>
>
> The SCMI error value SCMI_ERR_SUPPORT maps to linux error value
> '-EOPNOTSUPP', so when dump configs, need check the error value
> EOPNOTSUPP, otherwise there will be log "ERROR READING CONFIG SETTING".
>
> Signed-off-by: Peng Fan <peng.fan@....com>
(...)
>                         ret = pin_config_get_for_pin(pctldev, pin, &config);
>                 /* These are legal errors */
> -               if (ret == -EINVAL || ret == -ENOTSUPP)
> +               if (ret == -EINVAL || ret == -ENOTSUPP || ret == -EOPNOTSUPP)

TBH it's a bit odd to call an in-kernel API such as pin_config_get_for_pin()
and get -EOPNOTSUPP back. But it's not like I care a lot, so patch applied.

Yours,
Linus Walleij