tg3: fix tigon3_dma_hwbug_workaround()
Ari got kernel panics using tg3 NIC, and bisected to 2669069a "tg3: enable transmit time stamping." This is because tigon3_dma_hwbug_workaround() might alloc a new skb and free the original. We panic when skb_tx_timestamp() is called on freed skb. Reported-by: NAri Savolainen <ari.m.savolainen@gmail.com> Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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