linux-kernel - Re: [PATCH] [media] radio-si470x: remove h from printk format specifier

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Message-ID: <75eb199376d65f2c2b4c746ca9be8cfc9f774453.camel@perches.com>
Date:   Tue, 15 Dec 2020 14:07:05 -0800
From:   Joe Perches <joe@...ches.com>
To:     trix@...hat.com, hverkuil@...all.nl, mchehab@...nel.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [media] radio-si470x: remove h from printk format
 specifier

On Tue, 2020-12-15 at 13:33 -0800, trix@...hat.com wrote:
> From: Tom Rix <trix@...hat.com>
> 
> See Documentation/core-api/printk-formats.rst.
> 
> commit cbacb5ab0aa0 ("docs: printk-formats: Stop encouraging use of unnecessary %h[xudi] and %hh[xudi]")
> 
> Standard integer promotion is already done and %hx and %hhx is useless
> so do not encourage the use of %hh[xudi] or %h[xudi].
[]
> diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c b/drivers/media/radio/si470x/radio-si470x-i2c.c
[]
> @@ -410,7 +410,7 @@ 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",

Tom?  Do you know why your script missed this %hu?

btw: this would probably better as a single line something like:

		dev_warn(&client->dev,
			 "Firmware version: %u is older than known working version %u\n",
			 radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE
			 RADIO_FW_VERSION);

Also a few lines above is:

	dev_info(&client->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
			radio->registers[DEVICEID], radio->registers[SI_CHIPID])

and these %4.4hx uses are also not changed by this patch.