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 164b090..25d717e 100644
--- a/net/core/user_dma.c
+++ b/net/core/user_dma.c
@@ -51,6 +51,7 @@
{
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 @@
start = end;
}
- if (skb_shinfo(skb)->frag_list) {
- struct sk_buff *list = skb_shinfo(skb)->frag_list;
+ skb_walk_frags(skb, frag_iter) {
+ int end;
- for (; list; list = list->next) {
- int end;
+ WARN_ON(start > offset + len);
- 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;
+ 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: