diff options
| author | Hugh Dickins <hugh@veritas.com> | 2007-03-24 17:55:16 +1100 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2007-03-24 18:00:28 +1100 |
| commit | 38315878a560eede1a2db52e511ad3a2cfbb4206 (patch) | |
| tree | d28def51879e35b1b6faddfc457bd37d9a1f2700 /drivers/char/drm | |
| parent | d7d8aac79dc38cbdef83b774e49bafdae9918137 (diff) | |
| download | lwn-38315878a560eede1a2db52e511ad3a2cfbb4206.tar.gz lwn-38315878a560eede1a2db52e511ad3a2cfbb4206.zip | |
drm: fix DRM_CONSISTENT mapping
This patch got lost in the DRM git tree for ages, bring it back to life.
Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers/char/drm')
| -rw-r--r-- | drivers/char/drm/drm_vm.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/char/drm/drm_vm.c b/drivers/char/drm/drm_vm.c index f7d4e29d5073..2d83b0b3a514 100644 --- a/drivers/char/drm/drm_vm.c +++ b/drivers/char/drm/drm_vm.c @@ -175,8 +175,7 @@ static __inline__ struct page *drm_do_vm_shm_nopage(struct vm_area_struct *vma, offset = address - vma->vm_start; i = (unsigned long)map->handle + offset; - page = (map->type == _DRM_CONSISTENT) ? - virt_to_page((void *)i) : vmalloc_to_page((void *)i); + page = vmalloc_to_page((void *)i); if (!page) return NOPAGE_SIGBUS; get_page(page); @@ -651,10 +650,15 @@ static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) vma->vm_start, vma->vm_end, map->offset + offset); vma->vm_ops = &drm_vm_ops; break; - case _DRM_SHM: case _DRM_CONSISTENT: - /* Consistent memory is really like shared memory. It's only - * allocate in a different way */ + /* Consistent memory is really like shared memory. But + * it's allocated in a different way, so avoid nopage */ + if (remap_pfn_range(vma, vma->vm_start, + page_to_pfn(virt_to_page(map->handle)), + vma->vm_end - vma->vm_start, vma->vm_page_prot)) + return -EAGAIN; + /* fall through to _DRM_SHM */ + case _DRM_SHM: vma->vm_ops = &drm_vm_shm_ops; vma->vm_private_data = (void *)map; /* Don't let this area swap. Change when |