1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 68a496557788..03efb065455f 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -708,7 +708,8 @@ static int uio_mmap(struct file *filep, struct vm_area_struct *vma)
                 return -EINVAL;
 
         requested_pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
-        actual_pages = (idev->info->mem[mi].size + PAGE_SIZE -1) >> PAGE_SHIFT;
+        actual_pages = ((idev->info->mem[mi].addr & ~PAGE_MASK)
+                        + idev->info->mem[mi].size + PAGE_SIZE -1) >> PAGE_SHIFT;
         if (requested_pages > actual_pages)
                 return -EINVAL;