Fix memory corruption in fec_mpc52xx

The mpc5200 fec driver is corrupting memory. This patch fixes two bugs
where the wrong skb was being referenced.

Signed-off-by: Jon Smirl <jonsmirl@gmail.com>
Acked-by: Domen Puncer <domen.puncer@telargo.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/fec_mpc52xx.c b/drivers/net/fec_mpc52xx.c
index bf5a7caa5b52..79f7eade4773 100644
--- a/drivers/net/fec_mpc52xx.c
+++ b/drivers/net/fec_mpc52xx.c
@@ -422,7 +422,7 @@ static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
 
                 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
                                 (struct bcom_bd **)&bd);
-                dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE);
+                dma_unmap_single(&dev->dev, bd->skb_pa, rskb->len, DMA_FROM_DEVICE);
 
                 /* Test for errors in received frame */
                 if (status & BCOM_FEC_RX_BD_ERRORS) {
@@ -467,7 +467,7 @@ static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
                         bcom_prepare_next_buffer(priv->rx_dmatsk);
 
                 bd->status = FEC_RX_BUFFER_SIZE;
-                bd->skb_pa = dma_map_single(&dev->dev, rskb->data,
+                bd->skb_pa = dma_map_single(&dev->dev, skb->data,
                                 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 
                 bcom_submit_next_buffer(priv->rx_dmatsk, skb);