Hibernation: New testing facility (rev. 2)

[linux-2.6-omap-h63xx.git] / kernel / power / disk.c

diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 05b64790fe8391ed5189eee02144e5cf63f3fa2b..0866b163c6bb928716e75c876761040817dc4c24 100644 (file)
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -70,6 +70,35 @@ void hibernation_set_ops(struct platform_hibernation_ops *ops)
        mutex_unlock(&pm_mutex);
 }
 
+#ifdef CONFIG_PM_DEBUG
+static void hibernation_debug_sleep(void)
+{
+       printk(KERN_INFO "hibernation debug: Waiting for 5 seconds.\n");
+       mdelay(5000);
+}
+
+static int hibernation_testmode(int mode)
+{
+       if (hibernation_mode == mode) {
+               hibernation_debug_sleep();
+               return 1;
+       }
+       return 0;
+}
+
+static int hibernation_test(int level)
+{
+       if (pm_test_level == level) {
+               hibernation_debug_sleep();
+               return 1;
+       }
+       return 0;
+}
+#else /* !CONFIG_PM_DEBUG */
+static int hibernation_testmode(int mode) { return 0; }
+static int hibernation_test(int level) { return 0; }
+#endif /* !CONFIG_PM_DEBUG */
+
 /**
  *     platform_start - tell the platform driver that we're starting
  *     hibernation
@@ -167,6 +196,10 @@ int create_image(int platform_mode)
                goto Enable_irqs;
        }
 
+       if (hibernation_test(TEST_CORE))
+               goto Power_up;
+
+       in_suspend = 1;
        save_processor_state();
        error = swsusp_arch_suspend();
        if (error)
@@ -175,6 +208,7 @@ int create_image(int platform_mode)
        restore_processor_state();
        if (!in_suspend)
                platform_leave(platform_mode);
+ Power_up:
        /* NOTE:  device_power_up() is just a resume() for devices
         * that suspended with irqs off ... no overall powerup.
         */
@@ -211,24 +245,29 @@ int hibernation_snapshot(int platform_mode)
        if (error)
                goto Resume_console;
 
-       error = platform_pre_snapshot(platform_mode);
-       if (error)
+       if (hibernation_test(TEST_DEVICES))
                goto Resume_devices;
 
+       error = platform_pre_snapshot(platform_mode);
+       if (error || hibernation_test(TEST_PLATFORM))
+               goto Finish;
+
        error = disable_nonboot_cpus();
        if (!error) {
-               if (hibernation_mode != HIBERNATION_TEST) {
-                       in_suspend = 1;
-                       error = create_image(platform_mode);
-                       /* Control returns here after successful restore */
-               } else {
-                       printk("swsusp debug: Waiting for 5 seconds.\n");
-                       mdelay(5000);
-               }
+               if (hibernation_test(TEST_CPUS))
+                       goto Enable_cpus;
+
+               if (hibernation_testmode(HIBERNATION_TEST))
+                       goto Enable_cpus;
+
+               error = create_image(platform_mode);
+               /* Control returns here after successful restore */
        }
+ Enable_cpus:
        enable_nonboot_cpus();
- Resume_devices:
+ Finish:
        platform_finish(platform_mode);
+ Resume_devices:
        device_resume();
  Resume_console:
        resume_console();
@@ -406,11 +445,12 @@ int hibernate(void)
        if (error)
                goto Finish;
 
-       if (hibernation_mode == HIBERNATION_TESTPROC) {
-               printk("swsusp debug: Waiting for 5 seconds.\n");
-               mdelay(5000);
+       if (hibernation_test(TEST_FREEZER))
                goto Thaw;
-       }
+
+       if (hibernation_testmode(HIBERNATION_TESTPROC))
+               goto Thaw;
+
        error = hibernation_snapshot(hibernation_mode == HIBERNATION_PLATFORM);
        if (in_suspend && !error) {
                unsigned int flags = 0;
@@ -499,6 +539,10 @@ static int software_resume(void)
                goto Unlock;
        }
 
+       error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
+       if (error)
+               goto Finish;
+
        error = create_basic_memory_bitmaps();
        if (error)
                goto Finish;
@@ -522,6 +566,7 @@ static int software_resume(void)
  Done:
        free_basic_memory_bitmaps();
  Finish:
+       pm_notifier_call_chain(PM_POST_RESTORE);
        atomic_inc(&snapshot_device_available);
        /* For success case, the suspend path will release the lock */
  Unlock:
@@ -567,7 +612,8 @@ static const char * const hibernation_modes[] = {
  *     supports it (as determined by having hibernation_ops).
  */
 
-static ssize_t disk_show(struct kset *kset, char *buf)
+static ssize_t disk_show(struct kobject *kobj, struct kobj_attribute *attr,
+                        char *buf)
 {
        int i;
        char *start = buf;
@@ -597,7 +643,8 @@ static ssize_t disk_show(struct kset *kset, char *buf)
 }
 
 
-static ssize_t disk_store(struct kset *kset, const char *buf, size_t n)
+static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr,
+                         const char *buf, size_t n)
 {
        int error = 0;
        int i;
@@ -642,13 +689,15 @@ static ssize_t disk_store(struct kset *kset, const char *buf, size_t n)
 
 power_attr(disk);
 
-static ssize_t resume_show(struct kset *kset, char *buf)
+static ssize_t resume_show(struct kobject *kobj, struct kobj_attribute *attr,
+                          char *buf)
 {
        return sprintf(buf,"%d:%d\n", MAJOR(swsusp_resume_device),
                       MINOR(swsusp_resume_device));
 }
 
-static ssize_t resume_store(struct kset *kset, const char *buf, size_t n)
+static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr,
+                           const char *buf, size_t n)
 {
        unsigned int maj, min;
        dev_t res;
@@ -674,12 +723,14 @@ static ssize_t resume_store(struct kset *kset, const char *buf, size_t n)
 
 power_attr(resume);
 
-static ssize_t image_size_show(struct kset *kset, char *buf)
+static ssize_t image_size_show(struct kobject *kobj, struct kobj_attribute *attr,
+                              char *buf)
 {
        return sprintf(buf, "%lu\n", image_size);
 }
 
-static ssize_t image_size_store(struct kset *kset, const char *buf, size_t n)
+static ssize_t image_size_store(struct kobject *kobj, struct kobj_attribute *attr,
+                               const char *buf, size_t n)
 {
        unsigned long size;
 
@@ -708,7 +759,7 @@ static struct attribute_group attr_group = {
 
 static int __init pm_disk_init(void)
 {
-       return sysfs_create_group(&power_subsys.kobj, &attr_group);
+       return sysfs_create_group(power_kobj, &attr_group);
 }
 
 core_initcall(pm_disk_init);