提交 a61aac7c 编写于 作者: J Julia Lawall 提交者: John W. Linville

drivers/net/wireless/b43: Use kmemdup

Use kmemdup when some other buffer is immediately copied into the
allocated region.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
上级 a465a2cc
......@@ -1221,14 +1221,14 @@ static int dma_tx_fragment(struct b43_dmaring *ring,
meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
/* create a bounce buffer in zone_dma on mapping failure. */
if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
priv_info->bouncebuffer = kmalloc(skb->len, GFP_ATOMIC | GFP_DMA);
priv_info->bouncebuffer = kmemdup(skb->data, skb->len,
GFP_ATOMIC | GFP_DMA);
if (!priv_info->bouncebuffer) {
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
err = -ENOMEM;
goto out_unmap_hdr;
}
memcpy(priv_info->bouncebuffer, skb->data, skb->len);
meta->dmaaddr = map_descbuffer(ring, priv_info->bouncebuffer, skb->len, 1);
if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
......
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