diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index fa40fdf..fdfeab0 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -1221,14 +1221,14 @@
 	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)) {