[PATCH net] net/act_pedit: fix an error code

[Dan Carpenter]

I'm reviewing static checker warnings where we do ERR_PTR(0), which is
the same as NULL.  I'm pretty sure we intended to return ERR_PTR(-EINVAL)
here.  Sometimes these bugs lead to a NULL dereference but I don't
immediately see that problem here.

Fixes: 71d0ed7079df ("net/act_pedit: Support using offset relative to the 
conventional network headers")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/net/sched/act_pedit.c b/net/sched/act_pedit.c
index 164b5ac094be..7dc5892671c8 100644
--- a/net/sched/act_pedit.c
+++ b/net/sched/act_pedit.c
@@ -94,8 +94,10 @@ static struct tcf_pedit_key_ex 
*tcf_pedit_keys_ex_parse(struct nlattr *nla,
                k++;
        }
 
-       if (n)
+       if (n) {
+               err = -EINVAL;
                goto err_out;
+       }
 
        return keys_ex;