On Thu, Nov 18, 2010 at 10:15:43AM +0100, Michael Haardt wrote: > Hello, > > I miss a way to disable the transmit FIFO. >From userspace or from within a kernel driver? > UARTs that don't do hardware handshaking in hardware, but use a transmit > FIFO, can only be used if the peer can deal with the delayed handshaking > response. > > If slow peers can not receive at line rate, hardware handshaking will > still cause overruns with Linux as sender, because Linux fills the > transmit FIFO and transmission continues at worst for 16 characters with > a 16550 after CTS was asserted. > > So, how can I fix hardware flow control response to the non-delayed > behaviour as it worked with a 8250 or 16450 by disabling the transmit > FIFO? So you are saying this used to work and now it doesn't? confused, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
