diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 385434ff3960..344490e872b4 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -4659,11 +4659,16 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
 			if (skb_size < 0)
 				goto drop_it;
 
-			ri->skb = NULL;
-
 			pci_unmap_single(tp->pdev, dma_addr, skb_size,
 					 PCI_DMA_FROMDEVICE);
 
+			/* Ensure that the update to the skb happens
+			 * after the usage of the old DMA mapping.
+			 */
+			smp_wmb();
+
+			ri->skb = NULL;
+
 			skb_put(skb, len);
 		} else {
 			struct sk_buff *copy_skb;