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authorRafael J. Wysocki <rjw@sisk.pl>2012-03-28 23:30:14 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2012-03-28 23:30:14 +0200
commit7b5179ac14dbad945647ac9e76bbbf14ed9e0dbe (patch)
tree39213e51f3a19f3198929456f8ab4210a906674d
parent9b78c1da60b3c62ccdd1509f0902ad19ceaf776b (diff)
downloadlinux-7b5179ac14dbad945647ac9e76bbbf14ed9e0dbe.tar.bz2
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
-rw-r--r--kernel/power/hibernate.c23
1 files changed, 10 insertions, 13 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 0a186cfde788..639ff6e4ae9e 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -611,19 +611,19 @@ int hibernate(void)
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 @@ int hibernate(void)
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 @@ static int software_resume(void)
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 @@ static int software_resume(void)
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();