s390/sclp: Remove console power management support

Power management support was removed for s390 with commit 3942162 ("s390: remove broken hibernate / power management support"). Remove leftover sclp console-related power management code. Acked-by: Heiko Carstens <[email protected]> Signed-off-by: Peter Oberparleiter <[email protected]> Signed-off-by: Vasily Gorbik <[email protected]>
torvalds · Jun 18, 2021 · 5602bf8 · 5602bf8
1 parent 21adcf1
commit 5602bf8
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Showing 3 changed files with 3 additions and 63 deletions.
diff --git a/drivers/s390/char/sclp_con.c b/drivers/s390/char/sclp_con.c
@@ -35,8 +35,6 @@ static LIST_HEAD(sclp_con_outqueue);
 static struct sclp_buffer *sclp_conbuf;
 /* Timer for delayed output of console messages */
 static struct timer_list sclp_con_timer;
-/* Suspend mode flag */
-static int sclp_con_suspended;
 /* Flag that output queue is currently running */
 static int sclp_con_queue_running;
 
@@ -63,7 +61,7 @@ sclp_conbuf_callback(struct sclp_buffer *buffer, int rc)
  if (!list_empty(&sclp_con_outqueue))
  buffer = list_first_entry(&sclp_con_outqueue,
  struct sclp_buffer, list);
- if (!buffer || sclp_con_suspended) {
+ if (!buffer) {
  sclp_con_queue_running = 0;
  spin_unlock_irqrestore(&sclp_con_lock, flags);
  break;
@@ -85,7 +83,7 @@ static void sclp_conbuf_emit(void)
  if (sclp_conbuf)
  list_add_tail(&sclp_conbuf->list, &sclp_con_outqueue);
  sclp_conbuf = NULL;
- if (sclp_con_queue_running || sclp_con_suspended)
+ if (sclp_con_queue_running)
  goto out_unlock;
  if (list_empty(&sclp_con_outqueue))
  goto out_unlock;
@@ -179,8 +177,6 @@ sclp_console_write(struct console *console, const char *message,
  if (list_empty(&sclp_con_pages))
  sclp_console_full++;
  while (list_empty(&sclp_con_pages)) {
- if (sclp_con_suspended)
- goto out;
  if (sclp_console_drop_buffer())
  break;
  spin_unlock_irqrestore(&sclp_con_lock, flags);
@@ -213,7 +209,6 @@ sclp_console_write(struct console *console, const char *message,
  !timer_pending(&sclp_con_timer)) {
  mod_timer(&sclp_con_timer, jiffies + HZ / 10);
  }
-out:
  spin_unlock_irqrestore(&sclp_con_lock, flags);
 }
 
@@ -234,32 +229,6 @@ sclp_console_flush(void)
  sclp_console_sync_queue();
 }
 
-/*
- * Resume console: If there are cached messages, emit them.
- */
-static void sclp_console_resume(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&sclp_con_lock, flags);
- sclp_con_suspended = 0;
- spin_unlock_irqrestore(&sclp_con_lock, flags);
- sclp_conbuf_emit();
-}
-
-/*
- * Suspend console: Set suspend flag and flush console
- */
-static void sclp_console_suspend(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&sclp_con_lock, flags);
- sclp_con_suspended = 1;
- spin_unlock_irqrestore(&sclp_con_lock, flags);
- sclp_console_flush();
-}
-
 static int sclp_console_notify(struct notifier_block *self,
  unsigned long event, void *data)
 {
@@ -269,7 +238,7 @@ static int sclp_console_notify(struct notifier_block *self,
 
 static struct notifier_block on_panic_nb = {
  .notifier_call = sclp_console_notify,
- .priority = SCLP_PANIC_PRIO_CLIENT,
+ .priority = 1,
 };
 
 static struct notifier_block on_reboot_nb = {
@@ -290,22 +259,6 @@ static struct console sclp_console =
  .index = 0 /* ttyS0 */
 };
 
-/*
- * This function is called for SCLP suspend and resume events.
- */
-void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event)
-{
- switch (sclp_pm_event) {
- case SCLP_PM_EVENT_FREEZE:
- sclp_console_suspend();
- break;
- case SCLP_PM_EVENT_RESTORE:
- case SCLP_PM_EVENT_THAW:
- sclp_console_resume();
- break;
- }
-}
-
 /*
  * called by console_init() in drivers/char/tty_io.c at boot-time.
  */

diff --git a/drivers/s390/char/sclp_rw.c b/drivers/s390/char/sclp_rw.c
@@ -26,16 +26,9 @@
  */
 #define MAX_SCCB_ROOM (PAGE_SIZE - sizeof(struct sclp_buffer))
 
-static void sclp_rw_pm_event(struct sclp_register *reg,
- enum sclp_pm_event sclp_pm_event)
-{
- sclp_console_pm_event(sclp_pm_event);
-}
-
 /* Event type structure for write message and write priority message */
 static struct sclp_register sclp_rw_event = {
  .send_mask = EVTYP_MSG_MASK,
- .pm_event_fn = sclp_rw_pm_event,
 };
 
 /*

diff --git a/drivers/s390/char/sclp_rw.h b/drivers/s390/char/sclp_rw.h
@@ -88,10 +88,4 @@ int sclp_write(struct sclp_buffer *buffer, const unsigned char *, int);
 int sclp_emit_buffer(struct sclp_buffer *,void (*)(struct sclp_buffer *,int));
 int sclp_chars_in_buffer(struct sclp_buffer *);
 
-#ifdef CONFIG_SCLP_CONSOLE
-void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event);
-#else
-static inline void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event) { }
-#endif
-
 #endif /* __SCLP_RW_H__ */