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: Julia Lawall <julia@diku.dk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index fa40fdf..fdfeab0 100644 (file)
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -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)) {