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

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2009-06-09 00:19:10 -07:00
parent fbb398a832
commit 285e42802b
1 changed files with 20 additions and 22 deletions
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42
net/core/user_dma.c
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@ -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;
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: