diff options
Diffstat (limited to 'drivers/char/hpet.c')
| -rw-r--r-- | drivers/char/hpet.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index 615d262..fe6d4be 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -373,14 +373,26 @@ static int hpet_mmap(struct file *file, struct vm_area_struct *vma) struct hpet_dev *devp; unsigned long addr; + if (((vma->vm_end - vma->vm_start) != PAGE_SIZE) || vma->vm_pgoff) + return -EINVAL; + devp = file->private_data; addr = devp->hd_hpets->hp_hpet_phys; if (addr & (PAGE_SIZE - 1)) return -ENOSYS; + vma->vm_flags |= VM_IO; vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - return vm_iomap_memory(vma, addr, PAGE_SIZE); + + if (io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT, + PAGE_SIZE, vma->vm_page_prot)) { + printk(KERN_ERR "%s: io_remap_pfn_range failed\n", + __func__); + return -EAGAIN; + } + + return 0; #else return -ENOSYS; #endif |