On Thu, Oct 09, 2014 at 06:23:31PM +0200, Matthias Brugger wrote: > The calculation of value quot for highspeed register set to three > was wrong. This patch fixes the calculation so that the serial port > for baudrates bigger then 576000 baud is working correctly. > > Signed-off-by: Matthias Brugger <matthias.bgg@xxxxxxxxx> > --- > drivers/tty/serial/8250/8250_mtk.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c > index 1c4b4bf..4376c48 100644 > --- a/drivers/tty/serial/8250/8250_mtk.c > +++ b/drivers/tty/serial/8250/8250_mtk.c > @@ -81,7 +81,7 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios, > /* Set to highest baudrate supported */ > if (baud >= 1152000) > baud = 921600; > - quot = DIV_ROUND_CLOSEST(port->uartclk, 256 * baud); > + quot = (port->uartclk / (256 * baud)) + 1; > } > > /* Has this always been incorrect, or was it caused by a specific patch? Should it go to the stable kernels? If so, how far back? thanks, 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
