Acked-by: Yi-Hung Wei <[email protected]>

Actually, this patch has been backported in the MPLS GSO fix series as
in here: https://patchwork.ozlabs.org/patch/746674/

-Yi-Hung

On Wed, Apr 19, 2017 at 2:35 PM, Jarno Rajahalme <[email protected]> wrote:
> From: Yi-Hung Wei <[email protected]>
>
> Upstream commit:
>
>     commit 6f56f6186c18e3fd54122b73da68e870687b8c59
>     Author: Yi-Hung Wei <[email protected]>
>     Date:   Thu Mar 30 12:36:03 2017 -0700
>
>     openvswitch: Fix ovs_flow_key_update()
>
>     ovs_flow_key_update() is called when the flow key is invalid, and it is
>     used to update and revalidate the flow key. Commit 329f45bc4f19
>     ("openvswitch: add mac_proto field to the flow key") introduces mac_proto
>     field to flow key and use it to determine whether the flow key is valid.
>     However, the commit does not update the code path in ovs_flow_key_update()
>     to revalidate the flow key which may cause BUG_ON() on execute_recirc().
>     This patch addresses the aforementioned issue.
>
>     Fixes: 329f45bc4f19 ("openvswitch: add mac_proto field to the flow key")
>     Signed-off-by: Yi-Hung Wei <[email protected]>
>     Acked-by: Jiri Benc <[email protected]>
>     Signed-off-by: David S. Miller <[email protected]>
>
> Signed-off-by: Jarno Rajahalme <[email protected]>
> ---
>  datapath/flow.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/datapath/flow.c b/datapath/flow.c
> index 2bc1ad0..39cac25 100644
> --- a/datapath/flow.c
> +++ b/datapath/flow.c
> @@ -531,7 +531,7 @@ static int key_extract(struct sk_buff *skb, struct 
> sw_flow_key *key)
>
>         /* Link layer. */
>         clear_vlan(key);
> -       if (key->mac_proto == MAC_PROTO_NONE) {
> +       if (ovs_key_mac_proto(key) == MAC_PROTO_NONE) {
>                 if (unlikely(eth_type_vlan(skb->protocol)))
>                         return -EINVAL;
>
> @@ -756,7 +756,13 @@ static int key_extract(struct sk_buff *skb, struct 
> sw_flow_key *key)
>
>  int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key)
>  {
> -       return key_extract(skb, key);
> +       int res;
> +
> +       res = key_extract(skb, key);
> +       if (!res)
> +               key->mac_proto &= ~SW_FLOW_KEY_INVALID;
> +
> +       return res;
>  }
>
>  static int key_extract_mac_proto(struct sk_buff *skb)
> --
> 2.1.4
>
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