hibernation: freeze swap at hibernation

[net-next-2.6.git] / kernel / power / hibernate.c

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index aa9e916da4d53051eed6e7d12e9ddd37baaab3cd..c77963938bca440a90423952d6d85cf4d66abd83 100644 (file)
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2003 Patrick Mochel
  * Copyright (c) 2003 Open Source Development Lab
- * Copyright (c) 2004 Pavel Machek <pavel@suse.cz>
+ * Copyright (c) 2004 Pavel Machek <pavel@ucw.cz>
  * Copyright (c) 2009 Rafael J. Wysocki, Novell Inc.
  *
  * This file is released under the GPLv2.
@@ -277,7 +277,7 @@ static int create_image(int platform_mode)
                goto Enable_irqs;
        }
 
-       if (hibernation_test(TEST_CORE))
+       if (hibernation_test(TEST_CORE) || !pm_check_wakeup_events())
                goto Power_up;
 
        in_suspend = 1;
@@ -288,8 +288,10 @@ static int create_image(int platform_mode)
                        error);
        /* Restore control flow magically appears here */
        restore_processor_state();
-       if (!in_suspend)
+       if (!in_suspend) {
+               events_check_enabled = false;
                platform_leave(platform_mode);
+       }
 
  Power_up:
        sysdev_resume();
@@ -328,7 +330,7 @@ int hibernation_snapshot(int platform_mode)
 
        error = platform_begin(platform_mode);
        if (error)
-               return error;
+               goto Close;
 
        /* Preallocate image memory before shutting down devices. */
        error = hibernate_preallocate_memory();
@@ -336,6 +338,7 @@ int hibernation_snapshot(int platform_mode)
                goto Close;
 
        suspend_console();
+       hibernation_freeze_swap();
        saved_mask = clear_gfp_allowed_mask(GFP_IOFS);
        error = dpm_suspend_start(PMSG_FREEZE);
        if (error)
@@ -511,18 +514,24 @@ int hibernation_platform_enter(void)
 
        local_irq_disable();
        sysdev_suspend(PMSG_HIBERNATE);
+       if (!pm_check_wakeup_events()) {
+               error = -EAGAIN;
+               goto Power_up;
+       }
+
        hibernation_ops->enter();
        /* We should never get here */
        while (1);
 
-       /*
-        * We don't need to reenable the nonboot CPUs or resume consoles, since
-        * the system is going to be halted anyway.
-        */
+ Power_up:
+       sysdev_resume();
+       local_irq_enable();
+       enable_nonboot_cpus();
+
  Platform_finish:
        hibernation_ops->finish();
 
-       dpm_suspend_noirq(PMSG_RESTORE);
+       dpm_resume_noirq(PMSG_RESTORE);
 
  Resume_devices:
        entering_platform_hibernation = false;