1 files changed, 10 insertions, 7 deletions

diff --git a/kernel/power/process.c b/kernel/power/process.c
index b9a32860bef3..6d566bf7085c 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -60,13 +60,16 @@ static inline void freeze_process(struct task_struct *p)
         unsigned long flags;
 
         if (!freezing(p)) {
-                if (p->state == TASK_STOPPED)
-                        force_sig_specific(SIGSTOP, p);
-
-                freeze(p);
-                spin_lock_irqsave(&p->sighand->siglock, flags);
-                signal_wake_up(p, p->state == TASK_STOPPED);
-                spin_unlock_irqrestore(&p->sighand->siglock, flags);
+                rmb();
+                if (!frozen(p)) {
+                        if (p->state == TASK_STOPPED)
+                                force_sig_specific(SIGSTOP, p);
+
+                        freeze(p);
+                        spin_lock_irqsave(&p->sighand->siglock, flags);
+                        signal_wake_up(p, p->state == TASK_STOPPED);
+                        spin_unlock_irqrestore(&p->sighand->siglock, flags);
+                }
         }
 }