[PATCH 3.2 12/70] sh_eth: fix TX buffer byte-swapping

[Ben Hutchings]

3.2.76-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>

commit 3e2309937f1e5d538ff13da5fb8de41196927c61 upstream.

For the little-endian SH771x kernels the driver has to byte-swap the RX/TX
buffers,  however yet unset physcial address from the TX descriptor is used
to call sh_eth_soft_swap(). Use 'skb->data' instead...

Fixes: 31fcb99d9958 ("net: sh_eth: remove __flush_purge_region")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/renesas/sh_eth.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -1499,8 +1499,7 @@ static int sh_eth_start_xmit(struct sk_b
 	txdesc = &mdp->tx_ring[entry];
 	/* soft swap. */
 	if (!mdp->cd->hw_swap)
-		sh_eth_soft_swap(phys_to_virt(ALIGN(txdesc->addr, 4)),
-				 skb->len + 2);
+		sh_eth_soft_swap(PTR_ALIGN(skb->data, 4), skb->len + 2);
 	txdesc->addr = dma_map_single(&ndev->dev, skb->data, skb->len,
 				      DMA_TO_DEVICE);
 	if (skb->len < ETHERSMALL)