diff --git a/drivers/gpu/ion/ion_system_heap.c b/drivers/gpu/ion/ion_system_heap.c
index dfa9543ab79a..2a85df9ef89a 100644
--- a/drivers/gpu/ion/ion_system_heap.c
+++ b/drivers/gpu/ion/ion_system_heap.c
@@ -103,7 +103,7 @@ static void free_buffer_page(struct ion_system_heap *heap,
 		   security.  This uses vmap as we want to set the pgprot so
 		   the writes to occur to noncached mappings, as the pool's
 		   purpose is to keep the pages out of the cache */
-		for (i = 0; i < order / PAGE_SIZE; i++) {
+		for (i = 0; i < (1 << order); i++) {
 			struct page *sub_page = page + i;
 			void *addr = vmap(&sub_page, 1, VM_MAP,
 					  pgprot_writecombine(PAGE_KERNEL));