pxa168_eth: fix race in transmit path.

Because the socket buffer is freed in the completion interrupt, it is not
safe to access it after submitting it to the hardware.

Cc: stable@kernel.org
Cc: Sachin Sanap <ssanap@marvell.com>
Cc: Zhangfei Gao <zgao6@marvell.com>
Cc: Philip Rakity <prakity@marvell.com>
Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/pxa168_eth.c b/drivers/net/pxa168_eth.c
index 89f7540..5f597ca 100644 (file)
--- a/drivers/net/pxa168_eth.c
+++ b/drivers/net/pxa168_eth.c
@@ -1273,7 +1273,7 @@ static int pxa168_eth_start_xmit(struct sk_buff *skb, struct net_device *dev)
        wmb();
        wrl(pep, SDMA_CMD, SDMA_CMD_TXDH | SDMA_CMD_ERD);
 
-       stats->tx_bytes += skb->len;
+       stats->tx_bytes += length;
        stats->tx_packets++;
        dev->trans_start = jiffies;
        if (pep->tx_ring_size - pep->tx_desc_count <= 1) {