linux-kernel - Re: [PATCH] drivers: iio: Drop unnecessary explicit casting

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Date:   Sat, 21 Mar 2020 23:56:33 +0530
From:   Nishant Malpani <nish.malpani25@...il.com>
To:     Joe Perches <joe@...ches.com>, jic23@...nel.org
Cc:     knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers: iio: Drop unnecessary explicit casting

On 21/03/20 5:56 pm, Joe Perches wrote:
> On Wed, 2020-03-18 at 15:37 +0530, Nishant Malpani wrote:
>> Provide correct specifiers while printing error logs to discard the use
>> of unnecessary explicit casting.
> []
>> 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 %ld\n",
>> +			PTR_ERR(regmap));
> 
> Another option would be to use %pe to print the error identifier
> and not the error number
> 
By 'error identifier' you mean the symbolic error name (as described in 
docs [1]), right? Yes, to me, it makes sense too, as it would be more 
"readable" during debugging. Jonathan, if you agree, do I send a 
patchset replacing with %pe specifier for all the drivers in consideration?

With regards,
Nishant Malpani

[1] 
https://www.kernel.org/doc/html/latest/core-api/printk-formats.html#error-pointers

> etc...
> 
>