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

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Message-ID: <CAHp75VeM2q7wdnREoenyYpJ-tso2G6M-uyGFJGjPGL8hfUmzhQ@mail.gmail.com>
Date:   Fri, 19 Aug 2022 09:22:45 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Maximilian Luz <luzmaximilian@...il.com>,
        Divya Bharathi <divya.bharathi@...l.com>,
        Prasanth Ksr <prasanth.ksr@...l.com>,
        Henrique de Moraes Holschuh <hmh@....eng.br>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Dell.Client.Kernel@...l.com,
        Thinkpad-acpi devel ML <ibm-acpi-devel@...ts.sourceforge.net>
Subject: Re: [PATCH] platform: move from strlcpy with unused retval to strscpy

On Fri, Aug 19, 2022 at 12:06 AM Wolfram Sang
<wsa+renesas@...g-engineering.com> wrote:
>
> Follow the advice of the below link and prefer 'strscpy' in this

We refer to the functions like this: strscpy() (note no quote marks).

> subsystem. Conversion is 1:1 because the return value is not used.
> Generated by a coccinelle script.

I assume you are experimenting with coccinelle, so I have no objection
to the change, but in PDx86 we usually want to have one patch per
driver. Can you split?

You also may add
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
to each of them.

> 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/platform/surface/surface3_power.c          | 2 +-
>  drivers/platform/x86/dell/dell-wmi-sysman/sysman.c | 2 +-
>  drivers/platform/x86/intel/chtwc_int33fe.c         | 6 +++---
>  drivers/platform/x86/thinkpad_acpi.c               | 4 ++--
>  4 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/platform/surface/surface3_power.c b/drivers/platform/surface/surface3_power.c
> index 444ec81ba02d..4c53d116d59b 100644
> --- a/drivers/platform/surface/surface3_power.c
> +++ b/drivers/platform/surface/surface3_power.c
> @@ -519,7 +519,7 @@ static int mshw0011_probe(struct i2c_client *client)
>         i2c_set_clientdata(client, data);
>
>         memset(&board_info, 0, sizeof(board_info));
> -       strlcpy(board_info.type, "MSHW0011-bat0", I2C_NAME_SIZE);
> +       strscpy(board_info.type, "MSHW0011-bat0", I2C_NAME_SIZE);
>
>         bat0 = i2c_acpi_new_device(dev, 1, &board_info);
>         if (IS_ERR(bat0))
> diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c b/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c
> index 636bdfa83284..0a6411a8a104 100644
> --- a/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c
> +++ b/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c
> @@ -270,7 +270,7 @@ void strlcpy_attr(char *dest, char *src)
>         size_t len = strlen(src) + 1;
>
>         if (len > 1 && len <= MAX_BUFF)
> -               strlcpy(dest, src, len);
> +               strscpy(dest, src, len);
>
>         /*len can be zero because any property not-applicable to attribute can
>          * be empty so check only for too long buffers and log error
> diff --git a/drivers/platform/x86/intel/chtwc_int33fe.c b/drivers/platform/x86/intel/chtwc_int33fe.c
> index c52ac23e2331..1ea989df513c 100644
> --- a/drivers/platform/x86/intel/chtwc_int33fe.c
> +++ b/drivers/platform/x86/intel/chtwc_int33fe.c
> @@ -270,7 +270,7 @@ cht_int33fe_register_max17047(struct device *dev, struct cht_int33fe_data *data)
>         }
>
>         memset(&board_info, 0, sizeof(board_info));
> -       strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
> +       strscpy(board_info.type, "max17047", I2C_NAME_SIZE);
>         board_info.dev_name = "max17047";
>         board_info.fwnode = fwnode;
>         data->battery_fg = i2c_acpi_new_device(dev, 1, &board_info);
> @@ -361,7 +361,7 @@ static int cht_int33fe_typec_probe(struct platform_device *pdev)
>         }
>
>         memset(&board_info, 0, sizeof(board_info));
> -       strlcpy(board_info.type, "typec_fusb302", I2C_NAME_SIZE);
> +       strscpy(board_info.type, "typec_fusb302", I2C_NAME_SIZE);
>         board_info.dev_name = "fusb302";
>         board_info.fwnode = fwnode;
>         board_info.irq = fusb302_irq;
> @@ -381,7 +381,7 @@ static int cht_int33fe_typec_probe(struct platform_device *pdev)
>         memset(&board_info, 0, sizeof(board_info));
>         board_info.dev_name = "pi3usb30532";
>         board_info.fwnode = fwnode;
> -       strlcpy(board_info.type, "pi3usb30532", I2C_NAME_SIZE);
> +       strscpy(board_info.type, "pi3usb30532", I2C_NAME_SIZE);
>
>         data->pi3usb30532 = i2c_acpi_new_device(dev, 3, &board_info);
>         if (IS_ERR(data->pi3usb30532)) {
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index 22d4e8633e30..8dad0428a83c 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -7623,9 +7623,9 @@ static int __init volume_create_alsa_mixer(void)
>         data = card->private_data;
>         data->card = card;
>
> -       strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
> +       strscpy(card->driver, TPACPI_ALSA_DRVNAME,
>                 sizeof(card->driver));
> -       strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
> +       strscpy(card->shortname, TPACPI_ALSA_SHRTNAME,
>                 sizeof(card->shortname));
>         snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
>                  (thinkpad_id.ec_version_str) ?
> --
> 2.35.1
>


-- 
With Best Regards,
Andy Shevchenko