fbdev/vermillion: use vm_iomap_memory()

Use vm_iomap_memory() instead of [io_]remap_pfn_range().
vm_iomap_memory() gives us much simpler API to map memory to userspace,
and reduces possibilities for bugs.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Alan Hourihane <alanh@fairlite.demon.co.uk>

1 files changed, 4 insertions, 10 deletions

diff --git a/drivers/video/vermilion/vermilion.c b/drivers/video/vermilion/vermilion.c
index 0aa516fc59cd..09a136633f35 100644
--- a/drivers/video/vermilion/vermilion.c
+++ b/drivers/video/vermilion/vermilion.c
@@ -1003,24 +1003,18 @@ static int vmlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 static int vmlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 {
         struct vml_info *vinfo = container_of(info, struct vml_info, info);
-        unsigned long size = vma->vm_end - vma->vm_start;
         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
         int ret;
 
-        if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
-                return -EINVAL;
-        if (offset + size > vinfo->vram_contig_size)
-                return -EINVAL;
         ret = vmlfb_vram_offset(vinfo, offset);
         if (ret)
                 return -EINVAL;
-        offset += vinfo->vram_start;
+
         pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
         pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT;
-        if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
-                                                size, vma->vm_page_prot))
-                return -EAGAIN;
-        return 0;
+
+        return vm_iomap_memory(vma, vinfo->vram_start,
+                        vinfo->vram_contig_size);
 }
 
 static int vmlfb_sync(struct fb_info *info)