Hello Hans Verkuil, The patch 4d34c9267db7: "media: tegra_cec: use new cec_notifier_parse_hdmi_phandle helper" from Apr 10, 2019, leads to the following static checker warning: drivers/media/platform/tegra-cec/tegra_cec.c:337 tegra_cec_probe() warn: 'hdmi_dev' is an error pointer or valid drivers/media/platform/tegra-cec/tegra_cec.c 328 static int tegra_cec_probe(struct platform_device *pdev) 329 { 330 struct device *hdmi_dev; 331 struct tegra_cec *cec; 332 struct resource *res; 333 int ret = 0; 334 335 hdmi_dev = cec_notifier_parse_hdmi_phandle(&pdev->dev); 336 337 if (!hdmi_dev) ^^^^^^^^^ This should be IS_ERR(). 338 return -ENODEV; 339 340 cec = devm_kzalloc(&pdev->dev, sizeof(struct tegra_cec), GFP_KERNEL); 341 342 if (!cec) 343 return -ENOMEM; regards, dan carpenter