1 files changed, 4 insertions, 1 deletions

diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
index c9d625ca659e..d06d014afda6 100644
--- a/include/linux/res_counter.h
+++ b/include/linux/res_counter.h
@@ -142,7 +142,10 @@ static inline unsigned long long res_counter_margin(struct res_counter *cnt)
         unsigned long flags;
 
         spin_lock_irqsave(&cnt->lock, flags);
-        margin = cnt->limit - cnt->usage;
+        if (cnt->limit > cnt->usage)
+                margin = cnt->limit - cnt->usage;
+        else
+                margin = 0;
         spin_unlock_irqrestore(&cnt->lock, flags);
         return margin;
 }