drivers/video/backlight/as3711_bl.c: add OF support

[cascardo/linux.git] / drivers / video / vfb.c

diff --git a/drivers/video/vfb.c b/drivers/video/vfb.c
index 8bc1f93..ee5985e 100644 (file)
--- a/drivers/video/vfb.c
+++ b/drivers/video/vfb.c
@@ -420,9 +420,12 @@ static int vfb_mmap(struct fb_info *info,
        unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
        unsigned long page, pos;
 
-       if (offset + size > info->fix.smem_len) {
+       if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
+               return -EINVAL;
+       if (size > info->fix.smem_len)
+               return -EINVAL;
+       if (offset > info->fix.smem_len - size)
                return -EINVAL;
-       }
 
        pos = (unsigned long)info->fix.smem_start + offset;