On 11/27/2014 12:16 PM, Lars-Peter Clausen wrote: > [...] >>>> >>>>>>>> + >>>>>>>> + adc_dev->reg = devm_regulator_get(&pdev->dev, "vref"); >>>>>>>> + if (IS_ERR_OR_NULL(adc_dev->reg)) >>>>>>>> + return -EINVAL; >>>>>>> if (IS_ERR(adc_dev->reg)) >>>>>>> return PTR_ERR(adc_dev->reg); >>>>>> >>>>>> Are you sure? What if devm_regulator_get() returns NULL? >>>>>> >>>>> I had a look at it, but couldn't figure out a condition in which it >>>>> would return NULL. But I'd be happy to be informed of anything >>>>> different. >>>> >>>> If CONFIG_REGULATOR=n you get NULL there (although I added a select >>>> REGULATOR >>>> on the v4 I just posted). >>>> >>> Indeed, thanks. Now I'm thinking if it would make sense to handle >>> this special case in a special way (as it would be caused by an >>> invalid kernel config). Well, I guess, I leave it up to you. >> >> Well, adding the select REGULATOR that shouldn't happen, so let's better >> drop the NULL check entirely. > > Doing a 'select REGULATOR' can (and probably will sooner or later) > create nasty dependency loops. User selectable config items should not > be selected by another config item. If the driver really has a hard > dependency on the regulator framework then 'depends on REGULATOR' is the > right thing to do. > Fine, then. 'depends on REGULATOR' it is. -- Ezequiel -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
