esp4: remove assignment in if condition

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 360b565918c4..d2bf02e0a678 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -392,8 +392,10 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
         if (elen <= 0)
                 goto out;
 
-        if ((err = skb_cow_data(skb, 0, &trailer)) < 0)
+        err = skb_cow_data(skb, 0, &trailer);
+        if (err < 0)
                 goto out;
+
         nfrags = err;
 
         assoclen = sizeof(*esph);