Re: [PATCH] AT91 Serial: update the powersave handler to matchserial core

[Haavard Skinnemoen]

Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote:
> > Maybe the tty layer ensures that the buffer is empty before
> > suspending...would be interesting to know. In any case, any such bug  
> 
> It doesn't - but calling tty_wait_until_sent(tty, some_timeout) will do
> that for you providing you call it in a sleep capable context.

Looks like it doesn't matter -- the serial core shuts the port down
completely, which will among other things disable the DMA controller.

Haavard
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