On 07/16/2014 12:06 PM, Felipe Balbi wrote:
On Wed, Jul 16, 2014 at 05:54:56PM +0200, Sebastian Andrzej Siewior wrote:
On 07/16/2014 05:16 PM, Felipe Balbi wrote:
I wonder if you should get_sync() on start_tx() and only
put_autosuspend() at stop_tx(). I guess the outcome would be
largely the same, no ?
I just opened minicom on ttyS0 and gave a try. start_tx() was invoked
each time I pressed a key (sent a character). I haven't seen stop_tx()
even after after I closed minicom. I guess stop_tx() is invoked if you
switch half-duplex communication.
that's bad, I expected stop to be called also after each character.
The 8250 core auto-stops tx when the tx ring buffer is empty (except
in the case of dma, where stopping tx isn't necessary).
Regards,
Peter Hurley
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