diff options
Diffstat (limited to 'drivers/usb/serial/pl2303.c')
| -rw-r--r-- | drivers/usb/serial/pl2303.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 46dd09da2434..5d1a1931967e 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -533,6 +533,17 @@ static int pl2303_set_line_request(struct usb_serial_port *port, return 0; } +static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) +{ + bool ixon_change; + + ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || + a->c_cc[VSTART] != b->c_cc[VSTART] || + a->c_cc[VSTOP] != b->c_cc[VSTOP]; + + return tty_termios_hw_change(a, b) || ixon_change; +} + static void pl2303_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { @@ -544,7 +555,7 @@ static void pl2303_set_termios(struct tty_struct *tty, int ret; u8 control; - if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) + if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) return; buf = kzalloc(7, GFP_KERNEL); @@ -662,6 +673,9 @@ static void pl2303_set_termios(struct tty_struct *tty, pl2303_vendor_write(serial, 0x0, 0x41); else pl2303_vendor_write(serial, 0x0, 0x61); + } else if (I_IXON(tty) && !I_IXANY(tty) && START_CHAR(tty) == 0x11 && + STOP_CHAR(tty) == 0x13) { + pl2303_vendor_write(serial, 0x0, 0xc0); } else { pl2303_vendor_write(serial, 0x0, 0x0); } |