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tty: Replace ASYNC_SUSPENDED bit and update atomically

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Replace ASYNC_SUSPENDED bit in the tty_port::flags field with
TTY_PORT_SUSPENDED bit in the tty_port::iflags field. Introduce helpers
tty_port_set_suspended() and tty_port_suspended() to abstract
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 17:53:24 -07:00
committed by Greg Kroah-Hartman
parent 2d68655d15
commit 80f02d5424
3 changed files with 23 additions and 10 deletions
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12
drivers/s390/char/con3215.c
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@@ -289,7 +289,7 @@ static void raw3215_timeout(unsigned long __data)
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw->flags &= ~RAW3215_TIMER_RUNS;
if (!(raw->port.flags & ASYNC_SUSPENDED)) {
if (!tty_port_suspended(&raw->port)) {
raw3215_mk_write_req(raw);
raw3215_start_io(raw);
if ((raw->queued_read || raw->queued_write) &&
@@ -312,7 +312,7 @@ static void raw3215_timeout(unsigned long __data)
static inline void raw3215_try_io(struct raw3215_info *raw)
{
if (!(raw->port.flags & ASYNC_INITIALIZED) ||
(raw->port.flags & ASYNC_SUSPENDED))
tty_port_suspended(&raw->port))
return;
if (raw->queued_read != NULL)
raw3215_start_io(raw);
@@ -494,7 +494,7 @@ static void raw3215_make_room(struct raw3215_info *raw, unsigned int length)
/* While console is frozen for suspend we have no other
* choice but to drop message from the buffer to make
* room for even more messages. */
if (raw->port.flags & ASYNC_SUSPENDED) {
if (tty_port_suspended(&raw->port)) {
raw3215_drop_line(raw);
continue;
}
@@ -773,7 +773,7 @@ static int raw3215_pm_stop(struct ccw_device *cdev)
raw = dev_get_drvdata(&cdev->dev);
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
raw->port.flags |= ASYNC_SUSPENDED;
tty_port_set_suspended(&raw->port, 1);
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
return 0;
}
@@ -786,7 +786,7 @@ static int raw3215_pm_start(struct ccw_device *cdev)
/* Allow I/O again and flush output buffer. */
raw = dev_get_drvdata(&cdev->dev);
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw->port.flags &= ~ASYNC_SUSPENDED;
tty_port_set_suspended(&raw->port, 0);
raw->flags |= RAW3215_FLUSHING;
raw3215_try_io(raw);
raw->flags &= ~RAW3215_FLUSHING;
@@ -859,7 +859,7 @@ static void con3215_flush(void)
unsigned long flags;
raw = raw3215[0]; /* console 3215 is the first one */
if (raw->port.flags & ASYNC_SUSPENDED)
if (tty_port_suspended(&raw->port))
/* The console is still frozen for suspend. */
if (ccw_device_force_console(raw->cdev))
/* Forcing didn't work, no panic message .. */