drivers: net: xgene: fix possible use after free
drivers: net: xgene: fix possible use after free

Once TX has been enabled on a NIC, it is illegal to access skb,
as this skb might have been freed by another cpu, from TX completion
handler.

Signed-off-by: Eric Dumazet <312c7d941f03386814be517ffdb3e0eb6624e275@google.com>
Reported-by: Mark Rutland <1db9dd262beaa64f35756dd39531d9747b7778bb@arm.com>
Tested-by: Mark Rutland <1db9dd262beaa64f35756dd39531d9747b7778bb@arm.com>
Cc: Iyappan Subramanian <99eec12aaaa1409f8dbbcf313cbe986d130f383c@apm.com>
Acked-by: Iyappan Subramanian <99eec12aaaa1409f8dbbcf313cbe986d130f383c@apm.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs