[PATCH v2 1/3] hwmon: (lm90) Add power control
Stephen Warren
swarren at wwwdotorg.org
Thu Aug 8 13:33:13 EDT 2013
On 08/08/2013 05:23 AM, Guenter Roeck wrote:
> On 08/08/2013 02:47 AM, Wei Ni wrote:
...
>> I think get_regulator() will return error values, not only
>> -EPROBE_DEFER, so we should set data->lm90_reg to NULL to handle other
>> error values.
>>
> Matter of opinion if you want to check for IS_ERR or NULL later on.
No, if regulator returns either:
* Something valid
* Someting IS_ERR()
... then everywhere has to check the value using IS_ERR().
If regulator returns either:
* Something valid
* Someting NULL
... then everywhere has to check the value against NULL.
checking against both IS_ERR() and NULL shouldn't ever happen, and
likewise IS_ERR_OR_NULL() is deprecated.
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