Use global system_state to avoid system-state confusion

[Pavel Machek <pavel@ucw.cz>]

Hi!

I started using system_state (already defined in kernel.h) to allow
drivers to do something different in response to swsusp. This at least
kills ide-disk.c hack.

Please apply,
								Pavel

--- linux-mm.middle/drivers/ide/ide-disk.c	2004-08-17 12:21:43.000000000 +0200
+++ linux-mm/drivers/ide/ide-disk.c	2004-08-19 13:12:28.000000000 +0200
@@ -1406,7 +1406,7 @@
 {
 	switch (rq->pm->pm_step) {
 	case idedisk_pm_flush_cache:	/* Suspend step 1 (flush cache) complete */
-		if (rq->pm->pm_state == 4)
+		if (system_state == SYSTEM_SWSUSP_SNAPSHOT)
 			rq->pm->pm_step = ide_pm_state_completed;
 		else
 			rq->pm->pm_step = idedisk_pm_standby;
@@ -1678,7 +1678,6 @@
 		return;
 	}
 
-	printk("Shutdown: %s\n", drive->name);
 	dev->bus->suspend(dev, PM_SUSPEND_STANDBY);
 }
 
--- linux-mm.middle/include/linux/kernel.h	2004-08-17 12:21:44.000000000 +0200
+++ linux-mm/include/linux/kernel.h	2004-08-19 13:12:08.000000000 +0200
@@ -136,6 +136,9 @@
 extern enum system_states {
 	SYSTEM_BOOTING,
 	SYSTEM_RUNNING,
+	SYSTEM_SWSUSP_SNAPSHOT,
+	SYSTEM_DISK_SUSPEND,
+	SYSTEM_RAM_SUSPEND,
 	SYSTEM_HALT,
 	SYSTEM_POWER_OFF,
 	SYSTEM_RESTART,
--- linux-mm.middle/include/linux/pm.h	2004-08-15 19:15:05.000000000 +0200
+++ linux-mm/include/linux/pm.h	2004-08-19 13:12:08.000000000 +0200
@@ -193,11 +193,11 @@
 extern void (*pm_idle)(void);
 extern void (*pm_power_off)(void);
 
-enum {
-	PM_SUSPEND_ON,
-	PM_SUSPEND_STANDBY,
-	PM_SUSPEND_MEM,
-	PM_SUSPEND_DISK,
+enum system_state {
+	PM_SUSPEND_ON = 0,
+	PM_SUSPEND_STANDBY = 1,
+	PM_SUSPEND_MEM = 2,
+	PM_SUSPEND_DISK = 3,
 	PM_SUSPEND_MAX,
 };
 
--- linux-mm.middle/kernel/power/disk.c	2004-08-17 12:21:44.000000000 +0200
+++ linux-mm/kernel/power/disk.c	2004-08-19 13:13:35.000000000 +0200
@@ -15,6 +15,7 @@
 #include <linux/device.h>
 #include <linux/delay.h>
 #include <linux/fs.h>
+#include <linux/device.h>
 #include "power.h"
 
 
@@ -49,15 +50,18 @@
 	local_irq_save(flags);
 	switch(mode) {
 	case PM_DISK_PLATFORM:
+		system_state = SYSTEM_DISK_SUSPEND;
 		device_power_down(PM_SUSPEND_DISK);
 		error = pm_ops->enter(PM_SUSPEND_DISK);
 		break;
 	case PM_DISK_SHUTDOWN:
+		system_state = SYSTEM_POWER_OFF;
 		printk("Powering off system\n");
 		device_shutdown();
 		machine_power_off();
 		break;
 	case PM_DISK_REBOOT:
+		system_state = SYSTEM_RESTART;
 		device_shutdown();
 		machine_restart(NULL);
 		break;
@@ -114,6 +118,7 @@
 {
 	int error;
 
+	system_state = SYSTEM_SWSUSP_SNAPSHOT;
 	pm_prepare_console();
 
 	sys_sync();
@@ -226,6 +231,7 @@
 
 	pr_debug("PM: Preparing system for restore.\n");
 
+	system_state = SYSTEM_SWSUSP_SNAPSHOT;
 	if ((error = prepare()))
 		goto Free;
 
--- linux-mm.middle/kernel/power/main.c	2004-08-17 12:22:47.000000000 +0200
+++ linux-mm/kernel/power/main.c	2004-08-19 13:12:08.000000000 +0200
@@ -151,6 +151,7 @@
 		goto Unlock;
 	}
 
+	system_state = SYSTEM_RAM_SUSPEND;
 	pr_debug("PM: Preparing system for suspend\n");
 	if ((error = suspend_prepare(state)))
 		goto Unlock;
@@ -162,6 +163,7 @@
 	suspend_finish(state);
  Unlock:
 	up(&pm_sem);
+	system_state = SYSTEM_RUNNING;
 	return error;
 }
 

-- 
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