net: systemport: fix dma_unmap_single() len

dma_unmap_single() was called with dma_unmap_len(cb, dma_len),
unfortunately we failed to assign this length field in
bcm_sysport_rx_refill() or bcm_sysport_alloc_rx_bufs() using
dma_unmap_len_set().

This causes packet contents corruption because are we not invoking the
cache invalidation routines with the proper length.  Fix this by using
the full RX buffer size (RX_BUF_LENGTH) because the mappings for the RX
bufers are created with that size.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 8edc0980cdf5..26030d67518b 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -479,7 +479,7 @@ static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
                 cb = &priv->rx_cbs[priv->rx_read_ptr];
                 skb = cb->skb;
                 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
-                                dma_unmap_len(cb, dma_len), DMA_FROM_DEVICE);
+                                RX_BUF_LENGTH, DMA_FROM_DEVICE);
 
                 /* Extract the Receive Status Block prepended */
                 rsb = (struct rsb *)skb->data;