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ramips: DMA map the correct RX skb size 

The skb_reserve call prior to DMA mapping the RX skb reduced the skb
data len by 2. To not allow DMA to write behind the skb we should pass
the correct skb data len to the device.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>

SVN-Revision: 24123
owl
Gabor Juhos 2010-11-24 10:01:16 +00:00
parent f833e399f2
commit 624cfc5c91
1 changed files with 2 additions and 2 deletions
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4
target/linux/ramips/files/drivers/net/ramips.c
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@ -177,7 +177,7 @@ ramips_alloc_dma(struct raeth_priv *re)
skb_reserve(new_skb, 2); skb_reserve(new_skb, 2);
re->rx[i].rxd1 = dma_map_single(NULL, re->rx[i].rxd1 = dma_map_single(NULL,
new_skb->data, new_skb->data,
MAX_RX_LENGTH + 2, MAX_RX_LENGTH,
DMA_FROM_DEVICE); DMA_FROM_DEVICE);
re->rx[i].rxd2 |= RX_DMA_LSO; re->rx[i].rxd2 |= RX_DMA_LSO;
re->rx_skb[i] = new_skb; re->rx_skb[i] = new_skb;
@ -288,7 +288,7 @@ ramips_eth_rx_hw(unsigned long ptr)
skb_reserve(new_skb, 2); skb_reserve(new_skb, 2);
priv->rx[rx].rxd1 = dma_map_single(NULL, priv->rx[rx].rxd1 = dma_map_single(NULL,
new_skb->data, new_skb->data,
MAX_RX_LENGTH + 2, MAX_RX_LENGTH,
DMA_FROM_DEVICE); DMA_FROM_DEVICE);
} }