ramips: DMA map the correct RX skb size

The skb_reserve call prior to DMA mapping the RX skb reduced the skb
data len by 2. To not allow DMA to write behind the skb we should pass
the correct skb data len to the device.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24123 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ramips/files/drivers/net/ramips.c b/target/linux/ramips/files/drivers/net/ramips.c
index e3c4f13..1f3c35a 100644 (file)
--- a/target/linux/ramips/files/drivers/net/ramips.c
+++ b/target/linux/ramips/files/drivers/net/ramips.c
@@ -177,7 +177,7 @@ ramips_alloc_dma(struct raeth_priv *re)
                skb_reserve(new_skb, 2);
                re->rx[i].rxd1 = dma_map_single(NULL,
                                                new_skb->data,
-                                               MAX_RX_LENGTH + 2,
+                                               MAX_RX_LENGTH,
                                                DMA_FROM_DEVICE);
                re->rx[i].rxd2 |= RX_DMA_LSO;
                re->rx_skb[i] = new_skb;
@@ -288,7 +288,7 @@ ramips_eth_rx_hw(unsigned long ptr)
                        skb_reserve(new_skb, 2);
                        priv->rx[rx].rxd1 = dma_map_single(NULL,
                                                           new_skb->data,
-                                                          MAX_RX_LENGTH + 2,
+                                                          MAX_RX_LENGTH,
                                                           DMA_FROM_DEVICE);
                }