Re: serial flow control appears broken

[Paul Fulghum]

On Fri, 2007-07-27 at 12:22 -0600, Robert Hancock wrote:
> Maciej W. Rozycki wrote:
> >  The TTY line discipline driver could do that based on the amount of 
> > received data present in its buffer.  And it should if asked to (a brief 
> > look at drivers/char/n_tty.c reveals it does; obviously there may be a bug 
> 
> Really, where? In my look through the code I haven't found any mechanism 
> that would result in RTS being lowered based on TTY buffers filling up, 
> at least not in the 8250 case.

serial_core.c:uart_throttle()
serial_core.c:uart_unthrottle()

These are called by N_TTY in response to buffer levels.
 
--
Paul Fulghum
Microgate Systems, Ltd

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