[PATCH] drm: Document that drm_dev_alloc doesn't need a parent

Possible for purely virtual debug devices.

Signed-off-by: Daniel Vetter daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_drv.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 2e5c7d941313..4f41377b0b80 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -535,6 +535,8 @@ static void drm_fs_inode_free(struct inode *inode) * The initial ref-count of the object is 1. Use drm_dev_ref() and * drm_dev_unref() to take and drop further ref-counts. * + * Note that for purely virtual devices @parent can be NULL. + * * RETURNS: * Pointer to new DRM device, or NULL if out of memory. */