drm: Garbage collect drm_dev_fini

It has become empty. Given the few users I figured not much point
splitting this up.

v2: Rebase over i915 changes.

v3: Rebase over patch split fix.
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200323144950.3018436-26-daniel.vetter@ffwll.ch

drivers/gpu/drm/cirrus/cirrus.c

@@ -529,7 +529,6 @@ static void cirrus_mode_config_init(struct cirrus_device *cirrus)
 static void cirrus_release(struct drm_device *dev)
 {
 	drm_mode_config_cleanup(dev);
-	drm_dev_fini(dev);
 }
 
 DEFINE_DRM_GEM_FOPS(cirrus_fops);

drivers/gpu/drm/drm_drv.c

@@ -282,7 +282,6 @@ void drm_minor_release(struct drm_minor *minor)
  *		struct driver_device *priv = container_of(...);
  *
  *		drm_mode_config_cleanup(drm);
- *		drm_dev_fini(drm);
  *	}
  *
  *	static struct drm_driver driver_drm_driver = {
@@ -737,23 +736,6 @@ int devm_drm_dev_init(struct device *parent,
 }
 EXPORT_SYMBOL(devm_drm_dev_init);
 
-/**
- * drm_dev_fini - Finalize a dead DRM device
- * @dev: DRM device
- *
- * Finalize a dead DRM device. This is the converse to drm_dev_init() and
- * frees up all data allocated by it. All driver private data should be
- * finalized first. Note that this function does not free the @dev, that is
- * left to the caller.
- *
- * The ref-count of @dev must be zero, and drm_dev_fini() should only be called
- * from a &drm_driver.release callback.
- */
-void drm_dev_fini(struct drm_device *dev)
-{
-}
-EXPORT_SYMBOL(drm_dev_fini);
-
 /**
  * drm_dev_alloc - Allocate new DRM device
  * @driver: DRM driver to allocate device for
@@ -804,8 +786,6 @@ static void drm_dev_release(struct kref *ref)
 
 	if (dev->driver->release)
 		dev->driver->release(dev);
-	else
-		drm_dev_fini(dev);
 
 	drm_managed_release(dev);
 

drivers/gpu/drm/drm_mipi_dbi.c

@@ -592,7 +592,6 @@ void mipi_dbi_release(struct drm_device *drm)
 	DRM_DEBUG_DRIVER("\n");
 
 	drm_mode_config_cleanup(drm);
-	drm_dev_fini(drm);
 }
 EXPORT_SYMBOL(mipi_dbi_release);
 

drivers/gpu/drm/i915/i915_drv.c

@@ -906,11 +906,6 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent)
 	return i915;
 }
 
-static void i915_driver_destroy(struct drm_i915_private *i915)
-{
-	drm_dev_fini(&i915->drm);
-}
-
 /**
  * i915_driver_probe - setup chip and create an initial config
  * @pdev: PCI device
@@ -1013,7 +1008,6 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	pci_disable_device(pdev);
 out_fini:
 	i915_probe_error(i915, "Device initialization failed (%d)\n", ret);
-	i915_driver_destroy(i915);
 	drm_dev_put(&i915->drm);
 	return ret;
 }
@@ -1070,7 +1064,6 @@ static void i915_driver_release(struct drm_device *dev)
 	intel_runtime_pm_driver_release(rpm);
 
 	i915_driver_late_release(dev_priv);
-	i915_driver_destroy(dev_priv);
 }
 
 static int i915_driver_open(struct drm_device *dev, struct drm_file *file)

drivers/gpu/drm/i915/selftests/mock_gem_device.c

@@ -76,7 +76,6 @@ static void mock_device_release(struct drm_device *dev)
 
 	drm_mode_config_cleanup(&i915->drm);
 
-	drm_dev_fini(&i915->drm);
 out:
 	put_device(&i915->drm.pdev->dev);
 	i915->drm.pdev = NULL;
@@ -215,7 +214,6 @@ struct drm_i915_private *mock_gem_device(void)
 	intel_gt_driver_late_release(&i915->gt);
 	intel_memory_regions_driver_release(i915);
 	drm_mode_config_cleanup(&i915->drm);
-	drm_dev_fini(&i915->drm);
 	drm_dev_put(&i915->drm);
 
 	return NULL;

drivers/gpu/drm/ingenic/ingenic-drm.c

@@ -492,7 +492,6 @@ static irqreturn_t ingenic_drm_irq_handler(int irq, void *arg)
 static void ingenic_drm_release(struct drm_device *drm)
 {
 	drm_mode_config_cleanup(drm);
-	drm_dev_fini(drm);
 }
 
 static int ingenic_drm_enable_vblank(struct drm_crtc *crtc)

drivers/gpu/drm/mcde/mcde_drv.c

@@ -221,7 +221,6 @@ static int mcde_modeset_init(struct drm_device *drm)
 static void mcde_release(struct drm_device *drm)
 {
 	drm_mode_config_cleanup(drm);
-	drm_dev_fini(drm);
 }
 
 DEFINE_DRM_GEM_CMA_FOPS(drm_fops);

drivers/gpu/drm/tidss/tidss_drv.c

@@ -108,8 +108,6 @@ static void tidss_release(struct drm_device *ddev)
 	drm_kms_helper_poll_fini(ddev);
 
 	tidss_modeset_cleanup(tidss);
-
-	drm_dev_fini(ddev);
 }
 
 DEFINE_DRM_GEM_CMA_FOPS(tidss_fops);

drivers/gpu/drm/tiny/gm12u320.c

@@ -637,7 +637,6 @@ static void gm12u320_driver_release(struct drm_device *dev)
 
 	gm12u320_usb_free(gm12u320);
 	drm_mode_config_cleanup(dev);
-	drm_dev_fini(dev);
 }
 
 DEFINE_DRM_GEM_FOPS(gm12u320_fops);

drivers/gpu/drm/tiny/repaper.c

@@ -914,7 +914,6 @@ static void repaper_release(struct drm_device *drm)
 	DRM_DEBUG_DRIVER("\n");
 
 	drm_mode_config_cleanup(drm);
-	drm_dev_fini(drm);
 }
 
 static const uint32_t repaper_formats[] = {

drivers/gpu/drm/udl/udl_drv.c

@@ -38,7 +38,6 @@ static void udl_driver_release(struct drm_device *dev)
 {
 	udl_fini(dev);
 	udl_modeset_cleanup(dev);
-	drm_dev_fini(dev);
 }
 
 static struct drm_driver driver = {

drivers/gpu/drm/vgem/vgem_drv.c

@@ -432,7 +432,6 @@ static void vgem_release(struct drm_device *dev)
 	struct vgem_device *vgem = container_of(dev, typeof(*vgem), drm);
 
 	platform_device_unregister(vgem->platform);
-	drm_dev_fini(&vgem->drm);
 }
 
 static struct drm_driver vgem_driver = {

drivers/gpu/drm/vkms/vkms_drv.c

@@ -64,7 +64,6 @@ static void vkms_release(struct drm_device *dev)
 	platform_device_unregister(vkms->platform);
 	drm_atomic_helper_shutdown(&vkms->drm);
 	drm_mode_config_cleanup(&vkms->drm);
-	drm_dev_fini(&vkms->drm);
 	destroy_workqueue(vkms->output.composer_workq);
 }
 

drivers/gpu/drm/xen/xen_drm_front.c

@@ -460,8 +460,6 @@ static void xen_drm_drv_release(struct drm_device *dev)
 	drm_atomic_helper_shutdown(dev);
 	drm_mode_config_cleanup(dev);
 
-	drm_dev_fini(dev);
-
 	if (front_info->cfg.be_alloc)
 		xenbus_switch_state(front_info->xb_dev,
 				    XenbusStateInitialising);

include/drm/drm_drv.h

@@ -262,9 +262,7 @@ struct drm_driver {
 	 * @release:
 	 *
 	 * Optional callback for destroying device data after the final
-	 * reference is released, i.e. the device is being destroyed. Drivers
-	 * using this callback are responsible for calling drm_dev_fini()
-	 * to finalize the device and then freeing the struct themselves.
+	 * reference is released, i.e. the device is being destroyed.
 	 */
 	void (*release) (struct drm_device *);
 
@@ -620,7 +618,6 @@ int drm_dev_init(struct drm_device *dev,
 int devm_drm_dev_init(struct device *parent,
 		      struct drm_device *dev,
 		      struct drm_driver *driver);
-void drm_dev_fini(struct drm_device *dev);
 
 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
 				 struct device *parent);