PM / Hibernate: Disable usermode helpers right before freezing tasks
There is no reason to call usermodehelper_disable() before creating
memory bitmaps in hibernate() and software_resume(), so call it right
before freeze_processes(), in accordance with the other suspend and
hibernation code. Consequently, call usermodehelper_enable() right
after the thawing of tasks rather than after freeing the memory
bitmaps.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 0a186cfd..639ff6e 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -611,19 +611,19 @@
if (error)
goto Exit;
- error = usermodehelper_disable();
- if (error)
- goto Exit;
-
/* Allocate memory management structures */
error = create_basic_memory_bitmaps();
if (error)
- goto Enable_umh;
+ goto Exit;
printk(KERN_INFO "PM: Syncing filesystems ... ");
sys_sync();
printk("done.\n");
+ error = usermodehelper_disable();
+ if (error)
+ goto Exit;
+
error = freeze_processes();
if (error)
goto Free_bitmaps;
@@ -660,9 +660,8 @@
freezer_test_done = false;
Free_bitmaps:
- free_basic_memory_bitmaps();
- Enable_umh:
usermodehelper_enable();
+ free_basic_memory_bitmaps();
Exit:
pm_notifier_call_chain(PM_POST_HIBERNATION);
pm_restore_console();
@@ -777,15 +776,13 @@
if (error)
goto close_finish;
- error = usermodehelper_disable();
+ error = create_basic_memory_bitmaps();
if (error)
goto close_finish;
- error = create_basic_memory_bitmaps();
- if (error) {
- usermodehelper_enable();
+ error = usermodehelper_disable();
+ if (error)
goto close_finish;
- }
pr_debug("PM: Preparing processes for restore.\n");
error = freeze_processes();
@@ -805,8 +802,8 @@
swsusp_free();
thaw_processes();
Done:
- free_basic_memory_bitmaps();
usermodehelper_enable();
+ free_basic_memory_bitmaps();
Finish:
pm_notifier_call_chain(PM_POST_RESTORE);
pm_restore_console();
