net/core/user_dma.c: Use frag list abstraction interfaces.

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

diff --git a/net/core/user_dma.c b/net/core/user_dma.c
index 164b090d5ac3d5fed2b1d84753d11101f8a790f0..25d717ebc92e9152b77dc678e181551b160c7191 100644 (file)
--- a/net/core/user_dma.c
+++ b/net/core/user_dma.c
@@ -51,6 +51,7 @@ int dma_skb_copy_datagram_iovec(struct dma_chan *chan,
 {
        int start = skb_headlen(skb);
        int i, copy = start - offset;
+       struct sk_buff *frag_iter;
        dma_cookie_t cookie = 0;
 
        /* Copy header. */
@@ -94,31 +95,28 @@ int dma_skb_copy_datagram_iovec(struct dma_chan *chan,
                start = end;
        }
 
-       if (skb_shinfo(skb)->frag_list) {
-               struct sk_buff *list = skb_shinfo(skb)->frag_list;
-
-               for (; list; list = list->next) {
-                       int end;
-
-                       WARN_ON(start > offset + len);
-
-                       end = start + list->len;
-                       copy = end - offset;
-                       if (copy > 0) {
-                               if (copy > len)
-                                       copy = len;
-                               cookie = dma_skb_copy_datagram_iovec(chan, list,
-                                               offset - start, to, copy,
-                                               pinned_list);
-                               if (cookie < 0)
-                                       goto fault;
-                               len -= copy;
-                               if (len == 0)
-                                       goto end;
-                               offset += copy;
-                       }
-                       start = end;
+       skb_walk_frags(skb, frag_iter) {
+               int end;
+
+               WARN_ON(start > offset + len);
+
+               end = start + frag_iter->len;
+               copy = end - offset;
+               if (copy > 0) {
+                       if (copy > len)
+                               copy = len;
+                       cookie = dma_skb_copy_datagram_iovec(chan, frag_iter,
+                                                            offset - start,
+                                                            to, copy,
+                                                            pinned_list);
+                       if (cookie < 0)
+                               goto fault;
+                       len -= copy;
+                       if (len == 0)
+                               goto end;
+                       offset += copy;
                }
+               start = end;
        }
 
 end: