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@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;