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c26a38b313
It is possible that the UNDI ISR may be triggered before netdev_tx() returns control to pxenv_undi_transmit(). This means that pxenv_undi_isr() may see a zero undi_tx_count, and so not check for TX completions. This is not a significant problem, since it will check for TX completions on the next call to pxenv_undi_isr() anyway; it just means that the NBP will see a spurious IRQ that was apparently caused by nothing. Fix by updating the undi_tx_count before calling netdev_tx(), so that pxenv_undi_isr() can decrement it and report the TX completion.