sctp: Use frag list abstraction interfaces.

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 8 insertions, 9 deletions

diff --git a/net/sctp/input.c b/net/sctp/input.c
index d2e98803ffe3..c0c973e67add 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -81,13 +81,13 @@ static void sctp_add_backlog(struct sock *sk, struct sk_buff *skb);
 /* Calculate the SCTP checksum of an SCTP packet.  */
 static inline int sctp_rcv_checksum(struct sk_buff *skb)
 {
-        struct sk_buff *list = skb_shinfo(skb)->frag_list;
         struct sctphdr *sh = sctp_hdr(skb);
         __le32 cmp = sh->checksum;
+        struct sk_buff *list;
         __le32 val;
         __u32 tmp = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
 
-        for (; list; list = list->next)
+        skb_walk_frags(skb, list)
                 tmp = sctp_update_cksum((__u8 *)list->data, skb_headlen(list),
                                         tmp);
 
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 7c3dfd2d9489..0f01e5d8a24f 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -1881,7 +1881,7 @@ static int sctp_skb_pull(struct sk_buff *skb, int len)
         len -= skb_len;
         __skb_pull(skb, skb_len);
 
-        for (list = skb_shinfo(skb)->frag_list; list; list = list->next) {
+        skb_walk_frags(skb, list) {
                 rlen = sctp_skb_pull(list, len);
                 skb->len -= (len-rlen);
                 skb->data_len -= (len-rlen);
@@ -6660,7 +6660,7 @@ static void sctp_sock_rfree_frag(struct sk_buff *skb)
                 goto done;
 
         /* Don't forget the fragments. */
-        for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next)
+        skb_walk_frags(skb, frag)
                 sctp_sock_rfree_frag(frag);
 
 done:
@@ -6675,7 +6675,7 @@ static void sctp_skb_set_owner_r_frag(struct sk_buff *skb, struct sock *sk)
                 goto done;
 
         /* Don't forget the fragments. */
-        for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next)
+        skb_walk_frags(skb, frag)
                 sctp_skb_set_owner_r_frag(frag, sk);
 
 done:
diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index 5f186ca550d7..8b3560fd876d 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -976,9 +976,8 @@ static void sctp_ulpevent_receive_data(struct sctp_ulpevent *event,
          * In general, the skb passed from IP can have only 1 level of
          * fragments. But we allow multiple levels of fragments.
          */
-        for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) {
+        skb_walk_frags(skb, frag)
                 sctp_ulpevent_receive_data(sctp_skb2event(frag), asoc);
-        }
 }
 
 /* Do accounting for bytes just read by user and release the references to
@@ -1003,7 +1002,7 @@ static void sctp_ulpevent_release_data(struct sctp_ulpevent *event)
                 goto done;
 
         /* Don't forget the fragments. */
-        for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) {
+        skb_walk_frags(skb, frag) {
                 /* NOTE:  skb_shinfos are recursive. Although IP returns
                  * skb's with only 1 level of fragments, SCTP reassembly can
                  * increase the levels.
@@ -1026,7 +1025,7 @@ static void sctp_ulpevent_release_frag_data(struct sctp_ulpevent *event)
                 goto done;
 
         /* Don't forget the fragments. */
-        for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) {
+        skb_walk_frags(skb, frag) {
                 /* NOTE:  skb_shinfos are recursive. Although IP returns
                  * skb's with only 1 level of fragments, SCTP reassembly can
                  * increase the levels.