diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index db122a0..2789f7a 100644
--- a/drivers/base/dma-coherent.c
+++ b/drivers/base/dma-coherent.c
@@ -262,7 +262,7 @@
 		unsigned long off = vma->vm_pgoff;
 		int start = (vaddr - mem->virt_base) >> PAGE_SHIFT;
 		int user_count = vma_pages(vma);
-		int count = size >> PAGE_SHIFT;
+		int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
 
 		*ret = -ENXIO;
 		if (off < count && user_count <= count - off) {