[PATCH] drm/tilcdc: Check priv->crtc validity in cpufreq_transition()

[Peter Ujfalusi]

The notifier can be called before we have crtc. With the check we can avoid
NULL pointer dereference within tilcdc_crtc_update_clk().

Signed-off-by: Peter Ujfalusi <peter.ujfalusi at ti.com>
---
 drivers/gpu/drm/tilcdc/tilcdc_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index 3046a4a4232d..85093123722d 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -169,7 +169,7 @@ static int cpufreq_transition(struct notifier_block *nb,
 	struct tilcdc_drm_private *priv = container_of(nb,
 			struct tilcdc_drm_private, freq_transition);
 
-	if (val == CPUFREQ_POSTCHANGE)
+	if (val == CPUFREQ_POSTCHANGE && priv->crtc)
 		tilcdc_crtc_update_clk(priv->crtc);
 
 	return 0;
-- 
Peter

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