[PATCH] Fix no fb check

[Meng Yi]

For state->fb may be NULL in fsl_dcu_drm_plane_atomic_check function, if
so, return 0. No need check in fsl_dcu_drm_plane_atomic_update anymore.

Signed-off-by: Meng Yi <meng.yi at nxp.com>
---
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c 
b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
index 4b13cf9..8965580 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
@@ -41,6 +41,9 @@ static int fsl_dcu_drm_plane_atomic_check(struct drm_plane 
*plane,
 {
        struct drm_framebuffer *fb = state->fb;

+       if (!state->fb || !state->crtc)
+               return 0;
+
        switch (fb->pixel_format) {
        case DRM_FORMAT_RGB565:
        case DRM_FORMAT_RGB888:
@@ -85,9 +88,6 @@ static void fsl_dcu_drm_plane_atomic_update(struct drm_plane 
*plane,
        unsigned int alpha, bpp;
        int index, ret;

-       if (!fb)
-               return;
-
        index = fsl_dcu_drm_plane_index(plane);
        if (index < 0)
                return;
-- 
2.1.0.27.g96db324