[PATCH] drm: atmel-hlcdc: fix atmel_hlcdc_crtc_reset() implementation

[Boris Brezillon]

Reset crtc->state to NULL after freeing the state object and call
__drm_atomic_helper_crtc_destroy_state() helper instead of manually
calling drm_property_unreference_blob().

Signed-off-by: Boris Brezillon <boris.brezillon at free-electrons.com>
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 8df0aaf..15c1679 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -391,12 +391,11 @@ void atmel_hlcdc_crtc_reset(struct drm_crtc *crtc)
 {
        struct atmel_hlcdc_crtc_state *state;

-       if (crtc->state && crtc->state->mode_blob)
-               drm_property_unreference_blob(crtc->state->mode_blob);
-
        if (crtc->state) {
+               __drm_atomic_helper_crtc_destroy_state(crtc, crtc->state);
                state = drm_crtc_state_to_atmel_hlcdc_crtc_state(crtc->state);
                kfree(state);
+               crtc->state = NULL;
        }

        state = kzalloc(sizeof(*state), GFP_KERNEL);
-- 
2.7.4