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fbdev/sgivwfb: 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>
This commit is contained in:
Tomi Valkeinen 2013-04-18 07:50:44 +03:00
parent 5171774382
commit c84deb9d61
1 changed files with 7 additions and 13 deletions
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18
drivers/video/sgivwfb.c
View File

@ -705,23 +705,17 @@ static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
static int sgivwfb_mmap(struct fb_info *info, static int sgivwfb_mmap(struct fb_info *info,
struct vm_area_struct *vma) struct vm_area_struct *vma)
{ {
unsigned long size = vma->vm_end - vma->vm_start; int r;
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
return -EINVAL;
if (offset + size > sgivwfb_mem_size)
return -EINVAL;
offset += sgivwfb_mem_phys;
pgprot_val(vma->vm_page_prot) = pgprot_val(vma->vm_page_prot) =
pgprot_val(vma->vm_page_prot) | _PAGE_PCD; pgprot_val(vma->vm_page_prot) | _PAGE_PCD;
vma->vm_flags |= VM_IO;
if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT, r = vm_iomap_memory(vma, sgivwfb_mem_phys, sgivwfb_mem_size);
size, vma->vm_page_prot))
return -EAGAIN;
printk(KERN_DEBUG "sgivwfb: mmap framebuffer P(%lx)->V(%lx)\n", printk(KERN_DEBUG "sgivwfb: mmap framebuffer P(%lx)->V(%lx)\n",
offset, vma->vm_start); offset, vma->vm_start);
return 0;
return r;
} }
int __init sgivwfb_setup(char *options) int __init sgivwfb_setup(char *options)