[PATCH v2 01/21] drm: Export drm_dev_init() for subclassing

[Chris Wilson]

On Wed, Jun 01, 2016 at 12:01:44PM +0200, Daniel Vetter wrote:
> With the one bug in the error handling fixed, and the kerneldoc augmented:

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index f0553ccd4f71..4f3d3bba08f7 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -565,6 +565,9 @@ static void drm_fs_inode_free(struct inode *inode)
  *
  * Note that for purely virtual devices @parent can be NULL.
  *
+ * Drivers that do not want to allocate their own device struct
+ * embedding struct &drm_device can call drm_dev_alloc() instead.
+ *
  * RETURNS:
  * 0 on success, or error code on failure.
  */
@@ -616,7 +619,8 @@ int drm_dev_init(struct drm_device *dev,
        if (ret)
                goto err_minors;
 
-       if (drm_ht_create(&dev->map_hash, 12))
+       ret = drm_ht_create(&dev->map_hash, 12);
+       if (ret)
                goto err_minors;
 
        drm_legacy_ctxbitmap_init(dev);
@@ -670,6 +674,9 @@ EXPORT_SYMBOL(drm_dev_init);
  *
  * Note that for purely virtual devices @parent can be NULL.
  *
+ * Drivers that wish to subclass or embed struct &drm_device into their
+ * own struct should look at using drm_dev_init() instead.
+ *
  * RETURNS:
  * Pointer to new DRM device, or NULL if out of memory.
  */

> Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Thanks, nice catch for err_minors.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre