fbdev/sa1100fb: 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>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/drivers/video/sa1100fb.c b/drivers/video/sa1100fb.c
index cfbde5e..f34c858 100644 (file)
--- a/drivers/video/sa1100fb.c
+++ b/drivers/video/sa1100fb.c
@@ -556,7 +556,7 @@ static int sa1100fb_mmap(struct fb_info *info,
                         struct vm_area_struct *vma)
 {
        struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
-       unsigned long start, len, off = vma->vm_pgoff << PAGE_SHIFT;
+       unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
 
        if (off < info->fix.smem_len) {
                vma->vm_pgoff += 1; /* skip over the palette */
@@ -564,19 +564,9 @@ static int sa1100fb_mmap(struct fb_info *info,
                                             fbi->map_dma, fbi->map_size);
        }
 
-       start = info->fix.mmio_start;
-       len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
-
-       if ((vma->vm_end - vma->vm_start + off) > len)
-               return -EINVAL;
-
-       off += start & PAGE_MASK;
-       vma->vm_pgoff = off >> PAGE_SHIFT;
-       vma->vm_flags |= VM_IO;
        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-       return io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
-                                  vma->vm_end - vma->vm_start,
-                                  vma->vm_page_prot);
+
+       return vm_iomap_memory(vma, info->fix.mmio_start, info->fix.mmio_len);
 }
 
 static struct fb_ops sa1100fb_ops = {