linux-kernel - Re: [PATCH 01/13] iio: accel: kxsd9: Use suitable format specifier

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Date:   Sun, 22 Mar 2020 02:53:48 +0530
From:   Nishant Malpani <nish.malpani25@...il.com>
To:     Joe Perches <joe@...ches.com>, jic23@...nel.org
Cc:     andriy.shevchenko@...ux.intel.com, knaack.h@....de,
        lars@...afoo.de, pmeerw@...erw.net, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/13] iio: accel: kxsd9: Use suitable format specifier

On 22/03/20 2:39 am, Joe Perches wrote:
> On Sun, 2020-03-22 at 02:31 +0530, Nishant Malpani wrote:
>> Provide more suitable format specifiers while printing error logs.
>> Discards the use of unnecessary explicit casting and prints symbolic
>> error name which might prove to be convenient during debugging.
> 
> 
> 'Use suitable format specifier' is obscure and not specific.
> 
> All the subjects should likely be something like
> 
> [PATCH] subsystem: Use vsprintf extension %pe for symbolic error name
> 
Agreed. I was just skeptical about that previously because the commit 
subject line's length was going way beyond 50 chars. I do get your point 
though; I'll send in a v2!

> 
>> diff --git a/drivers/iio/accel/kxsd9-i2c.c b/drivers/iio/accel/kxsd9-i2c.c
> []
>> @@ -21,8 +21,8 @@ static int kxsd9_i2c_probe(struct i2c_client *i2c,
>>   
>>   	regmap = devm_regmap_init_i2c(i2c, &config);
>>   	if (IS_ERR(regmap)) {
>> -		dev_err(&i2c->dev, "Failed to register i2c regmap %d\n",
>> -			(int)PTR_ERR(regmap));
>> +		dev_err(&i2c->dev, "Failed to register i2c regmap %pe\n",
>> +			regmap;
> 
> And this could use a separator between regmap and errname like
> 
> 		dev_err(&i2c->dev, "Failed to register i2c regmap: %pe\n",
> or
> 		dev_err(&i2c->dev, "Failed to register i2c regmap - %pe\n",
> 
> 

Yes, I had thought of this but was too timid to ask, thinking it was 
perhaps there for legacy reasons :P

I'll add a separator in v2. Thanks for reviewing!

With regards,
Nishant Malpani