netdev - Re: [PATCH 1/2] vxlan: remove vxlan_group_used in vxlan

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Date:	Mon, 09 Dec 2013 19:32:44 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	gaofeng@...fujitsu.com
Cc:	stephen@...workplumber.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] vxlan: remove vxlan_group_used in vxlan_open

From: Gao feng <gaofeng@...fujitsu.com>
Date: Thu, 5 Dec 2013 17:01:35 +0800

> In vxlan_open, vxlan_group_used always returns true,
> because the state of the vxlan deivces which we want
> to open has alreay been running. and it has already
> in vxlan_list.
> 
> Since ip_mc_join_group takes care of the reference
> problem. we can remove vxlan_group_used here, let
> ip_mc_join_group resolve the reference problem.
> 
> Signed-off-by: Gao feng <gaofeng@...fujitsu.com>

"already" is misspelled in this commit message.

Please describe what "the reference problem" actually is.

> @@ -1943,8 +1943,7 @@ static int vxlan_open(struct net_device *dev)
>  	if (!vs)
>  		return -ENOTCONN;
>  
> -	if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
> -	    vxlan_group_used(vn, &vxlan->default_dst.remote_ip)) {
> +	if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {

This makes "vn" unused, please remove it.

The compiler even warns about this, are you watching the build
after making changes for messages like that?
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