1 files changed, 8 insertions, 13 deletions

diff --git a/net/sctp/output.c b/net/sctp/output.c
index 73639355157e..7d08f522ec84 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c
@@ -49,13 +49,10 @@
 #include <linux/ipv6.h>
 #include <linux/init.h>
 #include <net/inet_ecn.h>
+#include <net/ip.h>
 #include <net/icmp.h>
 #include <net/net_namespace.h>
 
-#ifndef TEST_FRAME
-#include <net/tcp.h>
-#endif /* TEST_FRAME (not defined) */
-
 #include <linux/socket.h> /* for sa_family_t */
 #include <net/sock.h>
 
@@ -367,7 +364,6 @@ int sctp_packet_transmit(struct sctp_packet *packet)
         struct sctp_transport *tp = packet->transport;
         struct sctp_association *asoc = tp->asoc;
         struct sctphdr *sh;
-        __be32 crc32 = __constant_cpu_to_be32(0);
         struct sk_buff *nskb;
         struct sctp_chunk *chunk, *tmp;
         struct sock *sk;
@@ -531,17 +527,16 @@ int sctp_packet_transmit(struct sctp_packet *packet)
          * Note: Adler-32 is no longer applicable, as has been replaced
          * by CRC32-C as described in <draft-ietf-tsvwg-sctpcsum-02.txt>.
          */
-        if (!(dst->dev->features & NETIF_F_NO_CSUM)) {
-                crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len);
-                crc32 = sctp_end_cksum(crc32);
+        if (!sctp_checksum_disable && !(dst->dev->features & NETIF_F_NO_CSUM)) {
+                __u32 crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len);
+
+                /* 3) Put the resultant value into the checksum field in the
+                 *    common header, and leave the rest of the bits unchanged.
+                 */
+                sh->checksum = sctp_end_cksum(crc32);
         } else
                 nskb->ip_summed = CHECKSUM_UNNECESSARY;
 
-        /* 3) Put the resultant value into the checksum field in the
-         *    common header, and leave the rest of the bits unchanged.
-         */
-        sh->checksum = crc32;
-
         /* IP layer ECN support
          * From RFC 2481
          *  "The ECN-Capable Transport (ECT) bit would be set by the