tty: Replace ASYNC_CHECK_CD and update atomically
Replace ASYNC_CHECK_CD bit in the tty_port::flags field with
TTY_PORT_CHECK_CD bit in the tty_port::iflags field. Introduce helpers
tty_port_set_check_carrier() and tty_port_check_carrier() to abstract
the atomic bit ops.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c
index c5f06b5..0b2bae1 100644
--- a/drivers/tty/isicom.c
+++ b/drivers/tty/isicom.c
@@ -577,7 +577,7 @@
header = inw(base);
switch (header & 0xff) {
case 0: /* Change in EIA signals */
- if (port->port.flags & ASYNC_CHECK_CD) {
+ if (tty_port_check_carrier(&port->port)) {
if (port->status & ISI_DCD) {
if (!(header & ISI_DCD)) {
/* Carrier has been lost */
@@ -758,10 +758,7 @@
outw(channel_setup, base);
InterruptTheCard(base);
}
- if (C_CLOCAL(tty))
- port->port.flags &= ~ASYNC_CHECK_CD;
- else
- port->port.flags |= ASYNC_CHECK_CD;
+ tty_port_set_check_carrier(&port->port, !C_CLOCAL(tty));
/* flow control settings ...*/
flow_ctrl = 0;
