drm/vc4: Nuke preclose hook

Again since the drm core takes care of event unlinking/disarming this
is now just needless code.

v2: Fixup misplaced hunk.

Cc: Eric Anholt <eric@anholt.net>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v1)
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453756616-28942-14-git-send-email-daniel.vetter@ffwll.ch

drivers/gpu/drm/vc4/vc4_crtc.c

@@ -593,26 +593,6 @@ static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {
 	.atomic_flush = vc4_crtc_atomic_flush,
 };
 
-/* Frees the page flip event when the DRM device is closed with the
- * event still outstanding.
- */
-void vc4_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file)
-{
-	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
-	struct drm_device *dev = crtc->dev;
-	unsigned long flags;
-
-	spin_lock_irqsave(&dev->event_lock, flags);
-
-	if (vc4_crtc->event && vc4_crtc->event->base.file_priv == file) {
-		vc4_crtc->event->base.destroy(&vc4_crtc->event->base);
-		drm_crtc_vblank_put(crtc);
-		vc4_crtc->event = NULL;
-	}
-
-	spin_unlock_irqrestore(&dev->event_lock, flags);
-}
-
 static const struct vc4_crtc_data pv0_data = {
 	.hvs_channel = 0,
 	.encoder0_type = VC4_ENCODER_TYPE_DSI0,

drivers/gpu/drm/vc4/vc4_drv.c

@@ -43,14 +43,6 @@ void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
 	return map;
 }
 
-static void vc4_drm_preclose(struct drm_device *dev, struct drm_file *file)
-{
-	struct drm_crtc *crtc;
-
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
-		vc4_cancel_page_flip(crtc, file);
-}
-
 static void vc4_lastclose(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
@@ -91,8 +83,6 @@ static struct drm_driver vc4_drm_driver = {
 			    DRIVER_HAVE_IRQ |
 			    DRIVER_PRIME),
 	.lastclose = vc4_lastclose,
-	.preclose = vc4_drm_preclose,
-
 	.irq_handler = vc4_irq,
 	.irq_preinstall = vc4_irq_preinstall,
 	.irq_postinstall = vc4_irq_postinstall,

drivers/gpu/drm/vc4/vc4_drv.h

@@ -376,7 +376,6 @@ int vc4_bo_stats_debugfs(struct seq_file *m, void *arg);
 extern struct platform_driver vc4_crtc_driver;
 int vc4_enable_vblank(struct drm_device *dev, unsigned int crtc_id);
 void vc4_disable_vblank(struct drm_device *dev, unsigned int crtc_id);
-void vc4_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
 int vc4_crtc_debugfs_regs(struct seq_file *m, void *arg);
 
 /* vc4_debugfs.c */