fec: replace flush_dcache_range with dma_sync_single

flush_dcache_range is not portable across architectures. Use
dma_sync_single instead. Also, the memory must be synchronised in the
receive path aswell.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index cab07eced06e..a17dc6af30c3 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -356,8 +356,8 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
         /* Push the data cache so the CPM does not get stale memory
          * data.
          */
-        flush_dcache_range((unsigned long)skb->data,
-                           (unsigned long)skb->data + skb->len);
+        dma_sync_single(NULL, bdp->cbd_bufaddr,
+                        bdp->cbd_datlen, DMA_TO_DEVICE);
 
         /* Send it on its way.  Tell FEC it's ready, interrupt when done,
          * it's the last BD of the frame, and to put the CRC on the end.
@@ -630,6 +630,9 @@ while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) {
         dev->stats.rx_bytes += pkt_len;
         data = (__u8*)__va(bdp->cbd_bufaddr);
 
+        dma_sync_single(NULL, (unsigned long)__pa(data),
+                        pkt_len - 4, DMA_FROM_DEVICE);
+
         /* This does 16 byte alignment, exactly what we need.
          * The packet length includes FCS, but we don't want to
          * include that when passing upstream as it messes up