diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index af6a776..5aa07de 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -2395,8 +2395,9 @@
 			bitmap_clear(rbio->dbitmap, pagenr, 1);
 		kunmap(p);
 
-		for (stripe = 0; stripe < rbio->real_stripes; stripe++)
+		for (stripe = 0; stripe < nr_data; stripe++)
 			kunmap(page_in_rbio(rbio, stripe, pagenr, 0));
+		kunmap(p_page);
 	}
 
 	__free_page(p_page);