From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sat, 16 May 2015 21:50:28 +0800

The commit c5adde9468b0714a051eac7f9666f23eb10b61f7 ("netlink:
eliminate nl_sk_hash_lock") breaks the autobind retry mechanism
because it doesn't reset portid after a failed netlink_insert.

This means that should autobind fail the first time around, then
the socket will be stuck in limbo as it can never be bound again
since it already has a non-zero portid.

Fixes: c5adde9468b0 ("netlink: eliminate nl_sk_hash_lock") 
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Looks good, applied and queued up for -stable.

Thanks!