gianfar: Fix race between gfar_error() and gfar_start_xmit()
gfar_error() can arrive at the middle of gfar_start_xmit() processing, and so it can trigger transfers of BDs that we don't yet expect to be transmitted. Fix this by locking the tx queues in gfar_error(). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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