linux-kernel - Re: [PATCH] Fixed all coding style issues for drivers/staging/media/lirc/

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Date:	Fri, 03 Oct 2014 02:58:45 +0300
From:	Antti Palosaari <crope@....fi>
To:	Joe Perches <joe@...ches.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
CC:	Amber Thrall <amber.rose.thrall@...il.com>, jarod@...sonet.com,
	linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fixed all coding style issues for drivers/staging/media/lirc/



On 10/02/2014 07:45 PM, Joe Perches wrote:
> On Thu, 2014-10-02 at 10:29 -0300, Mauro Carvalho Chehab wrote:
>> Em Wed, 01 Oct 2014 21:40:02 -0700 Amber Thrall <amber.rose.thrall@...il.com> escreveu:
>>> Fixed various coding style issues, including strings over 80 characters long and many
>>> deprecated printk's have been replaced with proper methods.
> []
>>> diff --git a/drivers/staging/media/lirc/lirc_imon.c b/drivers/staging/media/lirc/lirc_imon.c
> []
>>> @@ -623,8 +623,8 @@ static void imon_incoming_packet(struct imon_context *context,
>>>   	if (debug) {
>>>   		dev_info(dev, "raw packet: ");
>>>   		for (i = 0; i < len; ++i)
>>> -			printk("%02x ", buf[i]);
>>> -		printk("\n");
>>> +			dev_info(dev, "%02x ", buf[i]);
>>> +		dev_info(dev, "\n");
>>>   	}
>>
>> This is wrong, as the second printk should be printk_cont.
>>
>> The best here would be to change all above to use %*ph.
>> So, just:
>>
>> 	dev_debug(dev, "raw packet: %*ph\n", len, buf);
>
> Not quite.
>
> %*ph is length limited and only useful for lengths < 30 or so.
> Even then, it's pretty ugly.
>
> print_hex_dump_debug() is generally better.

That is place where you print 8 debug bytes, which are received remote 
controller code. IMHO %*ph format is just what you like in that case.

Why print_hex_dump_debug() is better? IIRC it could not be even 
controlled like those dynamic debug printings.

regards
Antti

-- 
http://palosaari.fi/
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