Hi Xiaotong, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on robh/for-next] [also build test WARNING on v4.17-rc3 next-20180504] [cannot apply to j.anaszewski-leds/for-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Baolin-Wang/dt-bindings-leds-Add-SC27xx-breathing-light-controller-documentation/20180504-200830 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next smatch warnings: drivers/leds/leds-sc27xx-bltc.c:337 sc27xx_led_probe() warn: unsigned 'reg' is never less than zero. vim +/reg +337 drivers/leds/leds-sc27xx-bltc.c 299 300 static int sc27xx_led_probe(struct platform_device *pdev) 301 { 302 struct device *dev = &pdev->dev; 303 struct device_node *np = dev->of_node, *child; 304 struct sc27xx_led_priv *priv; 305 u32 base, count, reg; 306 int err; 307 308 count = of_get_child_count(np); 309 if (!count || count > SC27XX_LEDS_MAX) 310 return -EINVAL; 311 312 err = of_property_read_u32(np, "reg", &base); 313 if (err) { 314 dev_err(dev, "fail to get reg of property\n"); 315 return err; 316 } 317 318 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 319 if (!priv) 320 return -ENOMEM; 321 322 priv->base = base; 323 priv->regmap = dev_get_regmap(dev->parent, NULL); 324 if (IS_ERR(priv->regmap)) { 325 err = PTR_ERR(priv->regmap); 326 dev_err(dev, "failed to get regmap: %d\n", err); 327 return err; 328 } 329 330 for_each_child_of_node(np, child) { 331 err = of_property_read_u32(child, "reg", ®); 332 if (err) { 333 of_node_put(child); 334 return err; 335 } 336 > 337 if (reg < 0 || reg >= SC27XX_LEDS_MAX 338 || priv->leds[reg].active) { 339 of_node_put(child); 340 return -EINVAL; 341 } 342 343 priv->leds[reg].active = true; 344 priv->leds[reg].ldev.name = 345 of_get_property(child, "label", NULL) ? : child->name; 346 } 347 348 return sc27xx_led_register(dev, priv); 349 } 350 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
