diff options
Diffstat (limited to 'drivers/tty/tty_port.c')
| -rw-r--r-- | drivers/tty/tty_port.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index ef9dd628ba0..bf6e238146a 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -227,7 +227,6 @@ int tty_port_block_til_ready(struct tty_port *port, int do_clocal = 0, retval; unsigned long flags; DEFINE_WAIT(wait); - int cd; /* block if port is in the process of being closed */ if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { @@ -284,11 +283,14 @@ int tty_port_block_til_ready(struct tty_port *port, retval = -ERESTARTSYS; break; } - /* Probe the carrier. For devices with no carrier detect this - will always return true */ - cd = tty_port_carrier_raised(port); + /* + * Probe the carrier. For devices with no carrier detect + * tty_port_carrier_raised will always return true. + * Never ask drivers if CLOCAL is set, this causes troubles + * on some hardware. + */ if (!(port->flags & ASYNC_CLOSING) && - (do_clocal || cd)) + (do_clocal || tty_port_carrier_raised(port))) break; if (signal_pending(current)) { retval = -ERESTARTSYS; |