Julian Wiedmann 886e1974dc
s390/qeth: don't access skb after transmission ...
After transmitting a skb via send_packet[_fast](), the statistics
code accesses the skb once more to account for transmitted page frags.
This has a (theoretical?) race against the TX completion - if the TX
completion is processed and frees the skb before hard_start_xmit()
gets to the statistics part, we access random memory.
Fix this by caching the # of page frags, before the skb is transmitted.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com >
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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