diff options
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index fd60d72..761a800 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1771,18 +1771,25 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios, sci_init_pins(port, termios->c_cflag); - if (s->cfg->capabilities & SCIx_HAVE_RTSCTS) { - reg = sci_getreg(port, SCFCR); - if (reg->size) { - unsigned short ctrl; + reg = sci_getreg(port, SCFCR); + if (reg->size) { + unsigned short ctrl = sci_in(port, SCFCR); - ctrl = sci_in(port, SCFCR); + if (s->cfg->capabilities & SCIx_HAVE_RTSCTS) { if (termios->c_cflag & CRTSCTS) ctrl |= SCFCR_MCE; else ctrl &= ~SCFCR_MCE; - sci_out(port, SCFCR, ctrl); } + + /* + * As we've done a sci_reset() above, ensure we don't + * interfere with the FIFOs while toggling MCE. As the + * reset values could still be set, simply mask them out. + */ + ctrl &= ~(SCFCR_RFRST | SCFCR_TFRST); + + sci_out(port, SCFCR, ctrl); } sci_out(port, SCSCR, s->cfg->scscr); |
