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/synclink_gt.c b/drivers/tty/synclink_gt.c
index c76f546..333652a 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -2080,7 +2080,7 @@
wake_up_interruptible(&info->event_wait_q);
info->pending_bh |= BH_STATUS;
- if (info->port.flags & ASYNC_CHECK_CD) {
+ if (tty_port_check_carrier(&info->port)) {
if (info->signals & SerialSignal_DCD)
wake_up_interruptible(&info->port.open_wait);
else {
@@ -2577,11 +2577,7 @@
info->timeout += HZ/50; /* Add .02 seconds of slop */
tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
-
- if (cflag & CLOCAL)
- info->port.flags &= ~ASYNC_CHECK_CD;
- else
- info->port.flags |= ASYNC_CHECK_CD;
+ tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
/* process tty input control flags */