hv_netvsc: Set VF priv_flags to IFF_NO_ADDRCONF before open to prevent IPv6 addrconf

[ Upstream commit d7501e076d859d2f381d57bd984ff6db13172727 ]

Set an additional flag IFF_NO_ADDRCONF to prevent ipv6 addrconf.

Commit under Fixes added a new flag change that was not made
to hv_netvsc resulting in the VF being assinged an IPv6.

Fixes: 8a321cf7becc ("net: add IFF_NO_ADDRCONF and use it in bonding to prevent ipv6 addrconf")
Suggested-by: Cathy Avery <cavery@redhat.com>
Signed-off-by: Li Tian <litian@redhat.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Link: https://patch.msgid.link/20250716002607.4927-1-litian@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 31242921c8285a887b8351e52e62bca014442fda..8c73f7105102027737d97cb70a74a8bb40e2aa7e 100644 (file)
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -2317,8 +2317,11 @@ static int netvsc_prepare_bonding(struct net_device *vf_netdev)
        if (!ndev)
                return NOTIFY_DONE;
 
-       /* set slave flag before open to prevent IPv6 addrconf */
+       /* Set slave flag and no addrconf flag before open
+        * to prevent IPv6 addrconf.
+        */
        vf_netdev->flags |= IFF_SLAVE;
+       vf_netdev->priv_flags |= IFF_NO_ADDRCONF;
        return NOTIFY_DONE;
 }