From: Yevgeny Petrilin <redacted>
Date: Tue, 26 May 2009 09:57:21 +0300

When the transmit queue gets full we enable interrupts for TX completions
There was a race that we handled the TX queue both from the interrupt context
and from the transmit function. Using "spin_trylock_irq()" ensures this
doesn't happen.

Signed-off-by: Yevgeny Petrilin <redacted>

I'll apply this, thanks.