tsnep: Replace TX spin_lock with __netif_tx_lock
TX spin_lock can be eliminated, because the normal TX path is already protected with __netif_tx_lock and this lock can be used for access to queue outside of normal TX path too. Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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