linux-kernel - Re: [PATCH 09/20] media: si470x: fix printk warnings with clang

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Message-ID: <YaE/59FBhmdNL4OY@archlinux-ax161>
Date:   Fri, 26 Nov 2021 13:13:27 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Hans Verkuil <hverkuil@...all.nl>,
        Kees Cook <keescook@...omium.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH 09/20] media: si470x: fix printk warnings with clang

On Wed, Nov 24, 2021 at 08:13:12PM +0100, Mauro Carvalho Chehab wrote:
> Clang doesn't like "%hu" on macros:
> 
> 	drivers/media/radio/si470x/radio-si470x-i2c.c:414:4: error: format specifies type 'unsigned short' but the argument has type 'int' [-Werror,-Wformat]
> 	drivers/media/radio/si470x/radio-si470x-i2c.c:417:4: error: format specifies type 'unsigned short' but the argument has type 'int' [-Werror,-Wformat]
> 
> So, just replace them with "%u".
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>

Maybe worth mentioning commit cbacb5ab0aa0 ("docs: printk-formats: Stop
encouraging use of unnecessary %h[xudi] and %hh[xudi]")?

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

> ---
> 
> To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
> See [PATCH 00/20] at: https://lore.kernel.org/all/cover.1637781097.git.mchehab+huawei@kernel.org/
> 
>  drivers/media/radio/si470x/radio-si470x-i2c.c | 4 ++--
>  drivers/media/radio/si470x/radio-si470x-usb.c | 8 ++++----
>  2 files changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c b/drivers/media/radio/si470x/radio-si470x-i2c.c
> index a972c0705ac7..7ea7c6326f53 100644
> --- a/drivers/media/radio/si470x/radio-si470x-i2c.c
> +++ b/drivers/media/radio/si470x/radio-si470x-i2c.c
> @@ -410,10 +410,10 @@ static int si470x_i2c_probe(struct i2c_client *client)
>  			radio->registers[DEVICEID], radio->registers[SI_CHIPID]);
>  	if ((radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
>  		dev_warn(&client->dev,
> -			"This driver is known to work with firmware version %hu,\n",
> +			"This driver is known to work with firmware version %u,\n",
>  			RADIO_FW_VERSION);
>  		dev_warn(&client->dev,
> -			"but the device has firmware version %hu.\n",
> +			"but the device has firmware version %u.\n",
>  			radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE);
>  		version_warning = 1;
>  	}
> diff --git a/drivers/media/radio/si470x/radio-si470x-usb.c b/drivers/media/radio/si470x/radio-si470x-usb.c
> index 3f8634a46573..1e70e6971fe4 100644
> --- a/drivers/media/radio/si470x/radio-si470x-usb.c
> +++ b/drivers/media/radio/si470x/radio-si470x-usb.c
> @@ -681,10 +681,10 @@ static int si470x_usb_driver_probe(struct usb_interface *intf,
>  			radio->registers[DEVICEID], radio->registers[SI_CHIPID]);
>  	if ((radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
>  		dev_warn(&intf->dev,
> -			"This driver is known to work with firmware version %hu,\n",
> +			"This driver is known to work with firmware version %u,\n",
>  			RADIO_FW_VERSION);
>  		dev_warn(&intf->dev,
> -			"but the device has firmware version %hu.\n",
> +			"but the device has firmware version %u.\n",
>  			radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE);
>  		version_warning = 1;
>  	}
> @@ -698,10 +698,10 @@ static int si470x_usb_driver_probe(struct usb_interface *intf,
>  			radio->software_version, radio->hardware_version);
>  	if (radio->hardware_version < RADIO_HW_VERSION) {
>  		dev_warn(&intf->dev,
> -			"This driver is known to work with hardware version %hu,\n",
> +			"This driver is known to work with hardware version %u,\n",
>  			RADIO_HW_VERSION);
>  		dev_warn(&intf->dev,
> -			"but the device has hardware version %hu.\n",
> +			"but the device has hardware version %u.\n",
>  			radio->hardware_version);
>  		version_warning = 1;
>  	}
> -- 
> 2.33.1
> 
>