netdev - Re: [PATCH] vxlan: Wrong type passed to %pIS

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Message-ID: <87wq3tnbn0.fsf@rasmusvillemoes.dk>
Date:	Sat, 07 Feb 2015 13:34:27 +0100
From:	Rasmus Villemoes <linux@...musvillemoes.dk>
To:	Cong Wang <xiyou.wangcong@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Pravin B Shelar <pshelar@...ira.com>,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] vxlan: Wrong type passed to %pIS

On Sat, Feb 07 2015, Cong Wang <xiyou.wangcong@...il.com> wrote:

> On Fri, Feb 6, 2015 at 6:17 PM, Rasmus Villemoes
> <linux@...musvillemoes.dk> wrote:
>> src_ip is a pointer to a union vxlan_addr, one member of which is a
>> struct sockaddr. Passing a pointer to src_ip is wrong; one should pass
>> the value of src_ip itself. Since %pIS formally expects something of
>> type struct sockaddr*, let's pass a pointer to the appropriate union
>> member, though this of course doesn't change the generated code.
>>
>
>
> It is a union, this doesn't harm.
>

Just to be clear: This fixes a real bug. The minimal fix had been

-                     src_mac, &rdst->remote_ip, &src_ip);
+                     src_mac, &rdst->remote_ip, src_ip);

but I through in the cosmetic improvements while the line needed
changing anyway.

> Since you are on it, there is another similar place in vxlan too.

... which is why I didn't change that other occurrence.

Rasmus
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