net: use INET_ECN_MASK instead of hardcoded 3

Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index f0dc3ad662ae..09ff51bf16a4 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -33,6 +33,7 @@
 #include <linux/netfilter.h>
 #include <linux/route.h>
 #include <linux/mroute.h>
+#include <net/inet_ecn.h>
 #include <net/route.h>
 #include <net/xfrm.h>
 #include <net/compat.h>
@@ -578,8 +579,8 @@ static int do_ip_setsockopt(struct sock *sk, int level,
                 break;
         case IP_TOS:    /* This sets both TOS and Precedence */
                 if (sk->sk_type == SOCK_STREAM) {
-                        val &= ~3;
-                        val |= inet->tos & 3;
+                        val &= ~INET_ECN_MASK;
+                        val |= inet->tos & INET_ECN_MASK;
                 }
                 if (inet->tos != val) {
                         inet->tos = val;