[tiL4.19-AD PATCH 1/2] drm/tilcdc: Check drm_fb_cma_get_gem_obj() return value

[Jyri Sarha]

drm_fb_cma_get_gem_obj() may return NULL. The return value needs to be
checked before dereferencing the returned pointer.

Signed-off-by: Jyri Sarha <jsarha at ti.com>
---
 drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index 1067e702c22c..a8ae064f52bb 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -75,6 +75,8 @@ static void set_scanout(struct drm_crtc *crtc, struct drm_framebuffer *fb)
 	u64 dma_base_and_ceiling;
 
 	gem = drm_fb_cma_get_gem_obj(fb, 0);
+	if (WARN_ON(!gem))
+		return;
 
 	start = gem->paddr + fb->offsets[0] +
 		crtc->y * fb->pitches[0] +
-- 
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