netdev - Re: [RFC PATCH 6/6] ppp: add rtnetlink device creation support

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Date:	Wed, 06 Apr 2016 10:02:56 +0200
From:	walter harms <wharms@....de>
To:	Guillaume Nault <g.nault@...halink.fr>
CC:	netdev@...r.kernel.org, linux-ppp@...r.kernel.org,
	Paul Mackerras <paulus@...ba.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [RFC PATCH 6/6] ppp: add rtnetlink device creation support



Am 05.04.2016 23:22, schrieb Guillaume Nault:
> On Tue, Apr 05, 2016 at 07:18:14PM +0200, walter harms wrote:
>>
>>
>> Am 05.04.2016 02:56, schrieb Guillaume Nault:
>>> @@ -1043,12 +1048,39 @@ static int ppp_dev_configure(struct net *src_net, struct net_device *dev,
>>>  			     const struct ppp_config *conf)
>>>  {
>>>  	struct ppp *ppp = netdev_priv(dev);
>>> +	struct file *file;
>>>  	int indx;
>>> +	int err;
>>> +
>>> +	if (conf->fd < 0) {
>>> +		file = conf->file;
>>> +		if (!file) {
>>> +			err = -EBADF;
>>> +			goto out;
>>
>> why not just return -EBADF;
>>
>>> +		}
>>> +	} else {
>>> +		file = fget(conf->fd);
>>> +		if (!file) {
>>> +			err = -EBADF;
>>> +			goto out;
>> 	
>> why not just return -EBADF;
>>
> Just because the 'out' label is declared anyway and because this
> centralises the return point. But I agree returning -EBADF directly
> could be more readable. I don't have strong opinion.

in this special case i would go for readable. People tend to miss these
if
 if
  if
constructs.

NTL its up to you.

re,
 wh