Re: [PATCH] staging: iio: light: Fix compiler warning in tsl2563.c

[Jonathan Cameron <jic23@cam.ac.uk>]

On 09/01/11 22:55, Dan Carpenter wrote:
> On Fri, Sep 02, 2011 at 12:24:13AM +0300, Maxin B. John wrote:
>> --- a/drivers/staging/iio/light/tsl2563.c
>> +++ b/drivers/staging/iio/light/tsl2563.c
>> @@ -225,9 +225,9 @@ static int tsl2563_read_id(struct tsl2563_chip *chip, u8 *id)
>>  
>>  	ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_ID);
>>  	if (ret < 0)
>> -		return ret;
>> +		return -EIO;
> 
> Don't overwrite the error code.  For example, the lower layers can
> return -EAGAIN and that's more useful than just returning -EIO every
> time.
> 
> Your fix works, but it's not very clean.  Just add a "*id = ret;"
> line before the "return 0;" and that's it.  (It doesn't make sense
> to pass a pointer to "id" and not use it).
> 
> (In other words, don't make any changes to the tsl2563_probe()
> function)
> 
>>  
>> -	return 0;
>> +	return ret;
>>  }
>> 
Yikes - I wonder why my various compilers don't throw that up.
Ah well Dan's fix is indeed the right one and what was intended.

Thanks,

Jonathan