From: Marcelo Ricardo Leitner <[email protected]>
Date: Tue, 25 Aug 2015 20:22:35 -0300
> Before 56ef9c909b40[1] it used to ignore all errors from igmp_join().
> That commit enhanced that and made it error out whatever error happened
> with igmp_join(), but that's not good because when using multicast
> groups vxlan will try to join it multiple times if the socket is reused
> and then the 2nd and further attempts will fail with EADDRINUSE.
>
> As we don't track to which groups the socket is already subscribed, it's
> okay to just ignore that error.
>
> Fixes: 56ef9c909b40 ("vxlan: Move socket initialization to within rtnl scope")
> Reported-by: John Nielsen <[email protected]>
> Signed-off-by: Marcelo Ricardo Leitner <[email protected]>
> ---
>
> John, please see how this goes for you. It worked in here.
>
> Dave, please consider this for stable trees. At least 4.1 is affected.
Applied and queued up for -stable, thanks.
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