[PATCH xfrm v1] xfrm: fix error flow in case of add state fails

[Aviad Yehezkel]

If add state fails in case of device offload, netdev refcount
will be negative since gc task is attempting to dev_free this state.
This is fixed by putting NULL in state dev field.

Signed-off-by: Aviad Yehezkel <avia...@mellanox.com>
Signed-off-by: Boris Pismeny <bor...@mellanox.com>
---
 net/xfrm/xfrm_device.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index fb3f920..cd2b7d3 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -109,6 +109,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state 
*x,
 
        err = dev->xfrmdev_ops->xdo_dev_state_add(x);
        if (err) {
+               xso->dev = NULL;
                dev_put(dev);
                return err;
        }
-- 
2.7.4