Messages in this thread | | | Date | Tue, 13 May 2008 15:55:29 +0200 | From | "Johann Baudy" <> | Subject | UIO: phys_mem_access_prot() miss? |
| |
Hi Hans, Greg,
I need some help on UIO driver. I have to add this below workaround (in uio.c) to be able to access phys memory from user space. I'm currently using PPC arch. Am I wrong? or Is it a miss?
static int uio_mmap(struct file *filep, struct vm_area_struct *vma) {
... switch (idev->info->mem[mi].memtype) { case UIO_MEM_PHYS: + vma->vm_page_prot = phys_mem_access_prot(filep, + idev->info->mem[mi].addr >> PAGE_SHIFT, + vma->vm_end - vma->vm_start, + vma->vm_page_prot); return uio_mmap_physical(vma); case UIO_MEM_LOGICAL: ...
}
FYI: I've copied those lines from mem char driver in mmap_mem().
Thanks in advance, Johann
| |