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tty: Replace ASYNC_CHECK_CD and update atomically

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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>
This commit is contained in:
Peter Hurley
2016-04-09 17:53:23 -07:00
committed by Greg Kroah-Hartman
parent 807c8d81f4
commit 2d68655d15
13 changed files with 39 additions and 64 deletions
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8
drivers/tty/synclink_gt.c
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@@ -2080,7 +2080,7 @@ static void dcd_change(struct slgt_info *info, unsigned short status)
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 @@ static void change_params(struct slgt_info *info)
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 */