netdev - Re: [PATCH 07/39] wimax: generic WiMAX device management (registration, deregistration, etc)

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Date:	Tue, 2 Dec 2008 18:06:36 -0800
From:	Inaky Perez-Gonzalez <inaky@...ux.intel.com>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	netdev@...r.kernel.org, wimax@...uxwimax.org
Subject: Re: [PATCH 07/39] wimax: generic WiMAX device management (registration, deregistration, etc)

On Thursday 27 November 2008, Patrick McHardy wrote:
> Inaky Perez-Gonzalez wrote:
> > +static
> > +struct nla_policy wimax_gnl_result_policy[WIMAX_GNL_ATTR_MAX + 1] = {
>
> const please for all policies.

Done.

> > +int wimax_gnl_send_rp_result(struct wimax_dev *wimax_dev,
> > +			     struct genl_info *genl_info,
> > +			     ssize_t code)
> > +{
> > +	int result;
> > +	struct device *dev = wimax_dev_to_dev(wimax_dev);
> > +	void *data;
> > +	struct sk_buff *reply_skb;
> > +	s64 code_s64 = code;
> > +
> > +	d_fnstart(3, dev, "(wimax_dev %p info %p code %zd)\n",
> > +		  wimax_dev, genl_info, code);
> > +	result = -ENOMEM;
> > +	reply_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
> > +	if (reply_skb == NULL)
> > +		goto error_new;
> > +	data = genlmsg_put_reply(reply_skb, genl_info,
> > +				 &wimax_dev->gnl_family,
> > +				 0, WIMAX_GNL_RP_RESULT);
> > +	if (data == NULL)
> > +		goto error_put_reply;
> > +
> > +	result = nla_put_u64(reply_skb, WIMAX_GNL_RESULT_CODE, (u64) code_s64);
> > +	if (result < 0)
> > +		dev_err(dev, "Error putting attribute: %d\n", result);
>
> This is not how netlink protocols should treat errors.
> It should return -ENOSPC (everywhere else also of course).

Other than the fact that this function is gone after Johannes comments
(so for everywhere else), wouldn't returning the -EMSGSIZE nla_put_*() 
returns enough?

I changed all of them to be something like:

result = nla_put*();
if (result < 0)
	goto error path /* release skb/msg, return result */

Thanks,

-- 
Inaky

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