drm/tilcdc: Flush flip-work workqueue before drm_flip_work_cleanup()

Flush flip-work workqueue before drm_flip_work_cleanup(). It causes a
nasty warning if there is unfinished flip-work in the queue when
drm_flip_work_cleanup() is called. The flush_workqueue() has to be
called before drm_crtc_cleanup() for unref_worker() to be able to do
its job.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index 5579d97b08e6..41ce411a64f9 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -18,6 +18,7 @@
 #include "drm_flip_work.h"
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_atomic_helper.h>
+#include <linux/workqueue.h>
 
 #include "tilcdc_drv.h"
 #include "tilcdc_regs.h"
@@ -227,9 +228,12 @@ static bool tilcdc_crtc_is_on(struct drm_crtc *crtc)
 static void tilcdc_crtc_destroy(struct drm_crtc *crtc)
 {
         struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+        struct tilcdc_drm_private *priv = crtc->dev->dev_private;
 
         tilcdc_crtc_disable(crtc);
 
+        flush_workqueue(priv->wq);
+
         of_node_put(crtc->port);
         drm_crtc_cleanup(crtc);
         drm_flip_work_cleanup(&tilcdc_crtc->unref_work);