linux-kernel - Re: [PATCH] thermal: move from strlcpy with unused retval to strscpy

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Message-ID: <CAJZ5v0hBsSA9aeE1divdaTxXUu8bT23tx8f+J+=pZPcP4viGjQ@mail.gmail.com>
Date:   Wed, 31 Aug 2022 21:14:35 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Linux PM <linux-pm@...r.kernel.org>
Subject: Re: [PATCH] thermal: move from strlcpy with unused retval to strscpy

On Thu, Aug 18, 2022 at 11:03 PM Wolfram Sang
<wsa+renesas@...g-engineering.com> wrote:
>
> Follow the advice of the below link and prefer 'strscpy' in this
> subsystem. Conversion is 1:1 because the return value is not used.
> Generated by a coccinelle script.
>
> Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> ---
>  drivers/thermal/thermal_core.c  | 2 +-
>  drivers/thermal/thermal_hwmon.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
> index 6a5d0ae5d7a4..0d1dae4ed7f6 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -1239,7 +1239,7 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t
>         }
>
>         tz->id = id;
> -       strlcpy(tz->type, type, sizeof(tz->type));
> +       strscpy(tz->type, type, sizeof(tz->type));
>
>         result = dev_set_name(&tz->device, "thermal_zone%d", tz->id);
>         if (result)
> diff --git a/drivers/thermal/thermal_hwmon.c b/drivers/thermal/thermal_hwmon.c
> index 09e49ec8b6f4..f53f4ceb6a5d 100644
> --- a/drivers/thermal/thermal_hwmon.c
> +++ b/drivers/thermal/thermal_hwmon.c
> @@ -147,7 +147,7 @@ int thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
>                 return -ENOMEM;
>
>         INIT_LIST_HEAD(&hwmon->tz_list);
> -       strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH);
> +       strscpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH);
>         strreplace(hwmon->type, '-', '_');
>         hwmon->device = hwmon_device_register_for_thermal(&tz->device,
>                                                           hwmon->type, hwmon);
> --

Applied as 6.1 material, thanks!