[PATCH v3 3/6] drm/tilcdc: Flush flip-work workqueue before drm_flip_work_cleanup()

[Jyri Sarha]

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 at ti.com>
---
 drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c 
b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index f4e6a5b..6974624 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"
@@ -247,9 +248,12 @@ out:
 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);
-- 
1.9.1