tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
net/core/user_dma.c: Use frag list abstraction interfaces.
Signed-off-by: David S. Miller <davem@davemloft.net>
+20
-22
+20
-22
net/core/user_dma.c
+20
-22
net/core/user_dma.c
···
51
51
{
52
52
int start = skb_headlen(skb);
53
53
int i, copy = start - offset;
54
+
struct sk_buff *frag_iter;
54
55
dma_cookie_t cookie = 0;
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/* Copy header. */
···
95
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start = end;
96
95
}
97
96
98
-
if (skb_shinfo(skb)->frag_list) {
99
-
struct sk_buff *list = skb_shinfo(skb)->frag_list;
97
+
skb_walk_frags(skb, frag_iter) {
98
+
int end;
100
99
101
-
for (; list; list = list->next) {
102
-
int end;
100
+
WARN_ON(start > offset + len);
103
101
104
-
WARN_ON(start > offset + len);
105
-
106
-
end = start + list->len;
107
-
copy = end - offset;
108
-
if (copy > 0) {
109
-
if (copy > len)
110
-
copy = len;
111
-
cookie = dma_skb_copy_datagram_iovec(chan, list,
112
-
offset - start, to, copy,
113
-
pinned_list);
114
-
if (cookie < 0)
115
-
goto fault;
116
-
len -= copy;
117
-
if (len == 0)
118
-
goto end;
119
-
offset += copy;
120
-
}
121
-
start = end;
102
+
end = start + frag_iter->len;
103
+
copy = end - offset;
104
+
if (copy > 0) {
105
+
if (copy > len)
106
+
copy = len;
107
+
cookie = dma_skb_copy_datagram_iovec(chan, frag_iter,
108
+
offset - start,
109
+
to, copy,
110
+
pinned_list);
111
+
if (cookie < 0)
112
+
goto fault;
113
+
len -= copy;
114
+
if (len == 0)
115
+
goto end;
116
+
offset += copy;
122
117
}
118
+
start = end;
123
119
}
124
120
125
121
end: