linux-kernel - Re: [PATCH v2 1/3] tty: n

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Message-ID: <87tv0dg0ii.fsf@FE-laptop>
Date:   Mon, 18 May 2020 09:33:57 +0200
From:   Gregory CLEMENT <gregory.clement@...tlin.com>
To:     Jiri Slaby <jslaby@...e.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v2 1/3] tty: n_gsm: Improve debug output

Hello Jiri,

> On 12. 05. 20, 13:53, Gregory CLEMENT wrote:
>> Use appropriate print helpers for debug messages.
>> 
>> Signed-off-by: Gregory CLEMENT <gregory.clement@...tlin.com>
>> ---
>>  drivers/tty/n_gsm.c | 14 ++------------
>>  1 file changed, 2 insertions(+), 12 deletions(-)
>> 
>> diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
>> index d77ed82a4840..67c8f8173023 100644
>> --- a/drivers/tty/n_gsm.c
>> +++ b/drivers/tty/n_gsm.c
>> @@ -504,18 +504,8 @@ static void gsm_print_packet(const char *hdr, int addr, int cr,
>>  	else
>>  		pr_cont("(F)");
>>  
>> -	if (dlen) {
>> -		int ct = 0;
>> -		while (dlen--) {
>> -			if (ct % 8 == 0) {
>> -				pr_cont("\n");
>> -				pr_debug("    ");
>> -			}
>> -			pr_cont("%02X ", *data++);
>> -			ct++;
>> -		}
>> -	}
>> -	pr_cont("\n");
>> +	if (dlen)
>
> This test is superfluous. print_hex_dump_* won't write anything when
> zero length is passed to it.

As I will send a v3 due to the issue found on the last patch, I am also
going to fix this.

Gregory

>
>> +		print_hex_dump_bytes("", DUMP_PREFIX_NONE, data, dlen);
>>  }
>
> thanks,
> -- 
> js
> suse labs

-- 
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com