netdev - Re: [PATCH] tipc: fix build issue when building without IPv6

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Date:	Thu, 19 Mar 2015 16:16:41 -0300
From:	Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:	David Miller <davem@...emloft.net>
CC:	richard.alpe@...csson.com, jon.maloy@...csson.com,
	ying.xue@...driver.com, netdev@...r.kernel.org,
	tipc-discussion@...ts.sourceforge.net, erik.hugne@...csson.com
Subject: Re: [PATCH] tipc: fix build issue when building without IPv6

On 19-03-2015 16:04, David Miller wrote:
> From: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
> Date: Thu, 19 Mar 2015 12:13:43 -0300
>
>> @@ -387,6 +391,11 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b,
>>   	tuncfg.encap_destroy = NULL;
>>   	setup_udp_tunnel_sock(net, ub->ubsock, &tuncfg);
>>
>> +	/* At this point, IPv6 module should have been loaded in
>> +	 * udp_sock_create/sock_create_kern().
>> +	 */
>> +	BUG_ON(!ipv6_stub);
>> +
>
> If IPV6=n this will be NULL no matter what.
>
> And if the module load gets an error, this will be NULL as well.
>

Oh indeed, and it (whatever check) should have been placed in a 
ipv6-only path, like vxlan used to do.

Will fix, thanks.

   Marcelo

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