tg3: Fix DMA mapping leak in tigon3_dma_hwbug_workaround().

Noticed by Michael Chan.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 355e8bc..1239207 100644 (file)
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -4631,6 +4631,9 @@ static int tigon3_dma_hwbug_workaround(struct tg3 *tp, struct sk_buff *skb,
                 * Drop the packet if it does.
                 */
                if (ret || tg3_4g_overflow_test(new_addr, new_skb->len)) {
+                       if (!ret)
+                               skb_dma_unmap(&tp->pdev->dev, new_skb,
+                                             DMA_TO_DEVICE);
                        ret = -1;
                        dev_kfree_skb(new_skb);
                        new_skb = NULL;