[PATCH] net: fs_enet: sync rx dma buffer before reading

[Mans Rullgard]

The dma_sync_single_for_cpu() call must precede reading the received
data. Fix this.

Fixes: 070e1f01827c ("net: fs_enet: don't unmap DMA when packet len is below 
copybreak")
Signed-off-by: Mans Rullgard <m...@mansr.com>
---
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c 
b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
index b3dae17e067e..432ce10cbfd0 100644
--- a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
+++ b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
@@ -240,14 +240,14 @@ static int fs_enet_napi(struct napi_struct *napi, int 
budget)
                                /* +2 to make IP header L1 cache aligned */
                                skbn = netdev_alloc_skb(dev, pkt_len + 2);
                                if (skbn != NULL) {
+                                       dma_sync_single_for_cpu(fep->dev,
+                                               CBDR_BUFADDR(bdp),
+                                               L1_CACHE_ALIGN(pkt_len),
+                                               DMA_FROM_DEVICE);
                                        skb_reserve(skbn, 2);   /* align IP 
header */
                                        skb_copy_from_linear_data(skb,
                                                      skbn->data, pkt_len);
                                        swap(skb, skbn);
-                                       dma_sync_single_for_cpu(fep->dev,
-                                               CBDR_BUFADDR(bdp),
-                                               L1_CACHE_ALIGN(pkt_len),
-                                               DMA_FROM_DEVICE);
                                }
                        } else {
                                skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
-- 
2.35.1