From: Alan Cox on
> update the last_busy time in the completion of every input URB). When
> the driver is throttled no URBs will be submitted, so the usage count
> will remain at 0 with no effort on the part of throttle().

You can still get modem changes (set_mctrl), break etc with the port
throttled, or indeed output.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/