Merge branch 'hibernate'

* hibernate:
  PM: Fix suspend_console and resume_console to use only one semaphore
  PM: Wait for console in resume
  PM: Fix pm_notifiers during user mode hibernation
  swsusp: clean up shrink_all_zones()
  swsusp: dont fiddle with swappiness
  PM: fix build for CONFIG_PM unset
  PM/hibernate: fix "swap breaks after hibernation failures"
  PM/resume: wait for device probing to finish
  Consolidate driver_probe_done() loops into one place

3 files changed, 21 insertions, 4 deletions

diff --git a/kernel/power/console.c b/kernel/power/console.c
index b8628be..a3961b20 100644
--- a/kernel/power/console.c
+++ b/kernel/power/console.c
@@ -78,6 +78,12 @@ void pm_restore_console(void)
 	}
 	set_console(orig_fgconsole);
 	release_console_sem();
+
+	if (vt_waitactive(orig_fgconsole)) {
+		pr_debug("Resume: Can't switch VCs.");
+		return;
+	}
+
 	kmsg_redirect = orig_kmsg;
 }
 #endif
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 432ee57..7b40e94b 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -595,6 +595,12 @@ static int software_resume(void)
 	unsigned int flags;
 
 	/*
+	 * If the user said "noresume".. bail out early.
+	 */
+	if (noresume)
+		return 0;
+
+	/*
 	 * name_to_dev_t() below takes a sysfs buffer mutex when sysfs
 	 * is configured into the kernel. Since the regular hibernate
 	 * trigger path is via sysfs which takes a buffer mutex before
@@ -610,6 +616,11 @@ static int software_resume(void)
 			mutex_unlock(&pm_mutex);
 			return -ENOENT;
 		}
+		/*
+		 * Some device discovery might still be in progress; we need
+		 * to wait for this to finish.
+		 */
+		wait_for_device_probe();
 		swsusp_resume_device = name_to_dev_t(resume_file);
 		pr_debug("PM: Resume from partition %s\n", resume_file);
 	} else {
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 005b93d..6c85359 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -95,15 +95,15 @@ static int snapshot_open(struct inode *inode, struct file *filp)
 		data->swap = swsusp_resume_device ?
 			swap_type_of(swsusp_resume_device, 0, NULL) : -1;
 		data->mode = O_RDONLY;
-		error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
+		error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
 		if (error)
-			pm_notifier_call_chain(PM_POST_RESTORE);
+			pm_notifier_call_chain(PM_POST_HIBERNATION);
 	} else {
 		data->swap = -1;
 		data->mode = O_WRONLY;
-		error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
+		error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
 		if (error)
-			pm_notifier_call_chain(PM_POST_HIBERNATION);
+			pm_notifier_call_chain(PM_POST_RESTORE);
 	}
 	if (error)
 		atomic_inc(&snapshot_device_available);