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-rw-r--r--net/sctp/output.c19
1 files changed, 8 insertions, 11 deletions
diff --git a/net/sctp/output.c b/net/sctp/output.c
index b4f3cf06d8da..08b3cead6503 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c
@@ -500,23 +500,20 @@ int sctp_packet_transmit(struct sctp_packet *packet)
500 * Note: Adler-32 is no longer applicable, as has been replaced 500 * Note: Adler-32 is no longer applicable, as has been replaced
501 * by CRC32-C as described in <draft-ietf-tsvwg-sctpcsum-02.txt>. 501 * by CRC32-C as described in <draft-ietf-tsvwg-sctpcsum-02.txt>.
502 */ 502 */
503 if (!sctp_checksum_disable && 503 if (!sctp_checksum_disable) {
504 !(dst->dev->features & (NETIF_F_NO_CSUM | NETIF_F_SCTP_CSUM))) { 504 if (!(dst->dev->features & NETIF_F_SCTP_CSUM)) {
505 __u32 crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len); 505 __u32 crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len);
506 506
507 /* 3) Put the resultant value into the checksum field in the 507 /* 3) Put the resultant value into the checksum field in the
508 * common header, and leave the rest of the bits unchanged. 508 * common header, and leave the rest of the bits unchanged.
509 */ 509 */
510 sh->checksum = sctp_end_cksum(crc32); 510 sh->checksum = sctp_end_cksum(crc32);
511 } else { 511 } else {
512 if (dst->dev->features & NETIF_F_SCTP_CSUM) {
513 /* no need to seed pseudo checksum for SCTP */ 512 /* no need to seed pseudo checksum for SCTP */
514 nskb->ip_summed = CHECKSUM_PARTIAL; 513 nskb->ip_summed = CHECKSUM_PARTIAL;
515 nskb->csum_start = (skb_transport_header(nskb) - 514 nskb->csum_start = (skb_transport_header(nskb) -
516 nskb->head); 515 nskb->head);
517 nskb->csum_offset = offsetof(struct sctphdr, checksum); 516 nskb->csum_offset = offsetof(struct sctphdr, checksum);
518 } else {
519 nskb->ip_summed = CHECKSUM_UNNECESSARY;
520 } 517 }
521 } 518 }
522 519