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s390: remove pm support from console drivers 

The power-management functions are unused since the
'commit 394216275c ("s390: remove broken hibernate / power management
support")'. Remove the unsued pm functions from the console drivers.

Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Vineeth Vijayan 2020-03-30 14:36:57 +02:00 committed by Heiko Carstens
parent 127fca6093
commit 1cf69b7b51
4 changed files with 15 additions and 150 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
drivers/s390/char/con3215.c
View File

@ -289,16 +289,14 @@ static void raw3215_timeout(struct timer_list *t)
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw->flags &= ~RAW3215_TIMER_RUNS;
if (!tty_port_suspended(&raw->port)) {
raw3215_mk_write_req(raw);
raw3215_start_io(raw);
if ((raw->queued_read || raw->queued_write) &&
!(raw->flags & RAW3215_WORKING) &&
!(raw->flags & RAW3215_TIMER_RUNS)) {
raw->timer.expires = RAW3215_TIMEOUT + jiffies;
add_timer(&raw->timer);
raw->flags |= RAW3215_TIMER_RUNS;
}
raw3215_mk_write_req(raw);
raw3215_start_io(raw);
if ((raw->queued_read || raw->queued_write) &&
!(raw->flags & RAW3215_WORKING) &&
!(raw->flags & RAW3215_TIMER_RUNS)) {
raw->timer.expires = RAW3215_TIMEOUT + jiffies;
add_timer(&raw->timer);
raw->flags |= RAW3215_TIMER_RUNS;
}
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
}
@ -311,7 +309,7 @@ static void raw3215_timeout(struct timer_list *t)
*/
static inline void raw3215_try_io(struct raw3215_info *raw)
{
if (!tty_port_initialized(&raw->port) || tty_port_suspended(&raw->port))
if (!tty_port_initialized(&raw->port))
return;
if (raw->queued_read != NULL)
raw3215_start_io(raw);
@ -463,26 +461,6 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm,
tty_kref_put(tty);
}
/*
* Drop the oldest line from the output buffer.
*/
static void raw3215_drop_line(struct raw3215_info *raw)
{
int ix;
char ch;
BUG_ON(raw->written != 0);
ix = (raw->head - raw->count) & (RAW3215_BUFFER_SIZE - 1);
while (raw->count > 0) {
ch = raw->buffer[ix];
ix = (ix + 1) & (RAW3215_BUFFER_SIZE - 1);
raw->count--;
if (ch == 0x15)
break;
}
raw->head = ix;
}
/*
* Wait until length bytes are available int the output buffer.
* Has to be called with the s390irq lock held. Can be called
@ -491,13 +469,6 @@ static void raw3215_drop_line(struct raw3215_info *raw)
static void raw3215_make_room(struct raw3215_info *raw, unsigned int length)
{
while (RAW3215_BUFFER_SIZE - raw->count < 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 (tty_port_suspended(&raw->port)) {
raw3215_drop_line(raw);
continue;
}
/* there might be a request pending */
raw->flags |= RAW3215_FLUSHING;
raw3215_mk_write_req(raw);
@ -763,36 +734,6 @@ static int raw3215_set_offline (struct ccw_device *cdev)
return 0;
}
static int raw3215_pm_stop(struct ccw_device *cdev)
{
struct raw3215_info *raw;
unsigned long flags;
/* Empty the output buffer, then prevent new I/O. */
raw = dev_get_drvdata(&cdev->dev);
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
tty_port_set_suspended(&raw->port, 1);
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
return 0;
}
static int raw3215_pm_start(struct ccw_device *cdev)
{
struct raw3215_info *raw;
unsigned long flags;
/* Allow I/O again and flush output buffer. */
raw = dev_get_drvdata(&cdev->dev);
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
tty_port_set_suspended(&raw->port, 0);
raw->flags |= RAW3215_FLUSHING;
raw3215_try_io(raw);
raw->flags &= ~RAW3215_FLUSHING;
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
return 0;
}
static struct ccw_device_id raw3215_id[] = {
{ CCW_DEVICE(0x3215, 0) },
{ /* end of list */ },
@ -808,9 +749,6 @@ static struct ccw_driver raw3215_ccw_driver = {
.remove = &raw3215_remove,
.set_online = &raw3215_set_online,
.set_offline = &raw3215_set_offline,
.freeze = &raw3215_pm_stop,
.thaw = &raw3215_pm_start,
.restore = &raw3215_pm_start,
.int_class = IRQIO_C15,
};
@ -858,11 +796,6 @@ static void con3215_flush(void)
unsigned long flags;
raw = raw3215[0]; /* console 3215 is the first one */
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 .. */
return;
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);

1
drivers/s390/char/con3270.c
View File

@ -544,7 +544,6 @@ con3270_flush(void)
cp = condev;
if (!cp->view.dev)
return;
raw3270_pm_unfreeze(&cp->view);
raw3270_activate_view(&cp->view);
spin_lock_irqsave(&cp->view.lock, flags);
con3270_wait_write(cp);

78
drivers/s390/char/raw3270.c
View File

@ -67,7 +67,6 @@ struct raw3270 {
#define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */
#define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */
#define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */
#define RAW3270_FLAGS_FROZEN 3 /* set if 3270 is frozen for suspend */
/* Semaphore to protect global data of raw3270 (devices, views, etc). */
static DEFINE_MUTEX(raw3270_mutex);
@ -260,8 +259,7 @@ raw3270_view_active(struct raw3270_view *view)
{
struct raw3270 *rp = view->dev;
return rp && rp->view == view &&
!test_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
return rp && rp->view == view;
}
int
@ -273,8 +271,7 @@ raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags);
rp = view->dev;
if (!rp || rp->view != view ||
test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
if (!rp || rp->view != view)
rc = -EACCES;
else if (!raw3270_state_ready(rp))
rc = -EBUSY;
@ -291,8 +288,7 @@ raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
int rc;
rp = view->dev;
if (!rp || rp->view != view ||
test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
if (!rp || rp->view != view)
rc = -EACCES;
else if (!raw3270_state_ready(rp))
rc = -EBUSY;
@ -629,8 +625,7 @@ raw3270_reset(struct raw3270_view *view)
int rc;
rp = view->dev;
if (!rp || rp->view != view ||
test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
if (!rp || rp->view != view)
rc = -EACCES;
else if (!raw3270_state_ready(rp))
rc = -EBUSY;
@ -854,8 +849,6 @@ raw3270_activate_view(struct raw3270_view *view)
rc = 0;
else if (!raw3270_state_ready(rp))
rc = -EBUSY;
else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
rc = -EACCES;
else {
oldview = NULL;
if (rp->view && rp->view->fn->deactivate) {
@ -903,8 +896,7 @@ raw3270_deactivate_view(struct raw3270_view *view)
list_del_init(&view->list);
list_add_tail(&view->list, &rp->view_list);
/* Try to activate another view. */
if (raw3270_state_ready(rp) &&
!test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
if (raw3270_state_ready(rp)) {
list_for_each_entry(view, &rp->view_list, list) {
rp->view = view;
if (view->fn->activate(view) == 0)
@ -999,8 +991,7 @@ raw3270_del_view(struct raw3270_view *view)
rp->view = NULL;
}
list_del_init(&view->list);
if (!rp->view && raw3270_state_ready(rp) &&
!test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
if (!rp->view && raw3270_state_ready(rp)) {
/* Try to activate another view. */
list_for_each_entry(nv, &rp->view_list, list) {
if (nv->fn->activate(nv) == 0) {
@ -1215,60 +1206,6 @@ raw3270_set_offline (struct ccw_device *cdev)
return 0;
}
static int raw3270_pm_stop(struct ccw_device *cdev)
{
struct raw3270 *rp;
struct raw3270_view *view;
unsigned long flags;
rp = dev_get_drvdata(&cdev->dev);
if (!rp)
return 0;
spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
if (rp->view && rp->view->fn->deactivate)
rp->view->fn->deactivate(rp->view);
if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) {
/*
* Release tty and fullscreen for all non-console
* devices.
*/
list_for_each_entry(view, &rp->view_list, list) {
if (view->fn->release)
view->fn->release(view);
}
}
set_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
return 0;
}
static int raw3270_pm_start(struct ccw_device *cdev)
{
struct raw3270 *rp;
unsigned long flags;
rp = dev_get_drvdata(&cdev->dev);
if (!rp)
return 0;
spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
if (rp->view && rp->view->fn->activate)
rp->view->fn->activate(rp->view);
spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
return 0;
}
void raw3270_pm_unfreeze(struct raw3270_view *view)
{
#ifdef CONFIG_TN3270_CONSOLE
struct raw3270 *rp;
rp = view->dev;
if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
ccw_device_force_console(rp->cdev);
#endif
}
static struct ccw_device_id raw3270_id[] = {
{ CCW_DEVICE(0x3270, 0) },
{ CCW_DEVICE(0x3271, 0) },
@ -1294,9 +1231,6 @@ static struct ccw_driver raw3270_ccw_driver = {
.remove = &raw3270_remove,
.set_online = &raw3270_set_online,
.set_offline = &raw3270_set_offline,
.freeze = &raw3270_pm_stop,
.thaw = &raw3270_pm_start,
.restore = &raw3270_pm_start,
.int_class = IRQIO_C70,
};

1
drivers/s390/char/raw3270.h
View File

@ -199,7 +199,6 @@ struct raw3270_notifier {
int raw3270_register_notifier(struct raw3270_notifier *);
void raw3270_unregister_notifier(struct raw3270_notifier *);
void raw3270_pm_unfreeze(struct raw3270_view *);
/*
* Little memory allocator for string objects.