1 files changed, 2 insertions, 3 deletions

diff --git a/kernel/dma-coherent.c b/kernel/dma-coherent.c
index 7517115a8cce..91e96950cd52 100644
--- a/kernel/dma-coherent.c
+++ b/kernel/dma-coherent.c
@@ -77,15 +77,14 @@ void *dma_mark_declared_memory_occupied(struct device *dev,
 {
         struct dma_coherent_mem *mem = dev->dma_mem;
         int pos, err;
-        int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1);
 
-        pages >>= PAGE_SHIFT;
+        size += device_addr & ~PAGE_MASK;
 
         if (!mem)
                 return ERR_PTR(-EINVAL);
 
         pos = (device_addr - mem->device_base) >> PAGE_SHIFT;
-        err = bitmap_allocate_region(mem->bitmap, pos, get_order(pages));
+        err = bitmap_allocate_region(mem->bitmap, pos, get_order(size));
         if (err != 0)
                 return ERR_PTR(err);
         return mem->virt_base + (pos << PAGE_SHIFT);