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SubjectRe: [PATCH 5/5] TTY: fix tty_wait_until_sent maximum timeout
On 03/04/2015 04:39 AM, Johan Hovold wrote:
> Currently tty_wait_until_sent may take up to twice as long as the
> requested timeout while waiting for driver and hardware buffers to
> drain.
>
> Fix this by taking the remaining number of jiffies after waiting for
> driver buffers to drain into account so that the timeout actually
> becomes a maximum timeout as it is documented to be.
>
> Note that this specifically implies tighter timings when closing a port
> as a consequence of actually honouring the port closing-wait setting
> for drivers relying on tty_wait_until_sent_from_close (e.g. via
> tty_port_close_start).

Reviewed-by: Peter Hurley <peter@hurleysoftware.com>



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