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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>
This commit is contained in:
Florian Fainelli 2014-05-15 14:33:52 -07:00 committed by David S. Miller
parent bd50806574
commit b1ff53e9fd
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/broadcom/bcmsysport.c
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@ -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;