net/enc28j60: oops fix

Prevent oops on enc28j60 packet RX:  make sure buffers are aligned.
Not all architectures support unaligned accesses in kernel space.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Claudio Lanconelli <lanconelli.claudio@eptar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/enc28j60.c b/drivers/net/enc28j60.c
index 0809a6a5a286..46a90e9ec563 100644
--- a/drivers/net/enc28j60.c
+++ b/drivers/net/enc28j60.c
@@ -900,7 +900,7 @@ static void enc28j60_hw_rx(struct net_device *ndev)
                 if (RSV_GETBIT(rxstat, RSV_LENCHECKERR))
                         ndev->stats.rx_frame_errors++;
         } else {
-                skb = dev_alloc_skb(len);
+                skb = dev_alloc_skb(len + NET_IP_ALIGN);
                 if (!skb) {
                         if (netif_msg_rx_err(priv))
                                 dev_err(&ndev->dev,
@@ -908,6 +908,7 @@ static void enc28j60_hw_rx(struct net_device *ndev)
                         ndev->stats.rx_dropped++;
                 } else {
                         skb->dev = ndev;
+                        skb_reserve(skb, NET_IP_ALIGN);
                         /* copy the packet from the receive buffer */
                         enc28j60_mem_read(priv, priv->next_pk_ptr + sizeof(rsv),
                                         len, skb_put(skb, len));