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Date:   Wed, 16 Dec 2020 13:52:36 +0800
From:   kernel test robot <lkp@...el.com>
To:     Gene Chen <gene.chen.richtek@...il.com>,
        jacek.anaszewski@...il.com, pavel@....cz, robh+dt@...nel.org,
        matthias.bgg@...il.com
Cc:     kbuild-all@...ts.01.org, dmurphy@...com,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v12 5/5] leds: mt6360: Add LED driver for MT6360

Hi Gene,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on pavel-linux-leds/for-next]
[also build test WARNING on robh/for-next linus/master v5.10 next-20201215]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Gene-Chen/leds-mt6360-Add-LED-driver-for-MT6360/20201210-140617
base:   git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git for-next
config: x86_64-randconfig-m001-20201215 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

smatch warnings:
drivers/leds/leds-mt6360.c:778 mt6360_led_probe() warn: always true condition '(reg >= 0) => (0-u32max >= 0)'

vim +778 drivers/leds/leds-mt6360.c

   714	
   715	static int mt6360_led_probe(struct platform_device *pdev)
   716	{
   717		struct mt6360_priv *priv;
   718		struct fwnode_handle *child;
   719		size_t count;
   720		int i = 0, ret;
   721	
   722		count = device_get_child_node_count(&pdev->dev);
   723		if (!count || count > MT6360_MAX_LEDS) {
   724			dev_err(&pdev->dev, "No child node or node count over max led number %lu\n", count);
   725			return -EINVAL;
   726		}
   727	
   728		priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, count), GFP_KERNEL);
   729		if (!priv)
   730			return -ENOMEM;
   731	
   732		priv->leds_count = count;
   733		priv->dev = &pdev->dev;
   734		mutex_init(&priv->lock);
   735	
   736		priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
   737		if (!priv->regmap) {
   738			dev_err(&pdev->dev, "Failed to get parent regmap\n");
   739			return -ENODEV;
   740		}
   741	
   742		device_for_each_child_node(&pdev->dev, child) {
   743			struct mt6360_led *led = priv->leds + i;
   744			struct led_init_data init_data = { .fwnode = child, };
   745			u32 reg, led_color;
   746	
   747			ret = fwnode_property_read_u32(child, "color", &led_color);
   748			if (ret)
   749				goto out_flash_release;
   750	
   751			if (led_color == LED_COLOR_ID_RGB || led_color == LED_COLOR_ID_MULTI)
   752				reg = MT6360_VIRTUAL_MULTICOLOR;
   753			else {
   754				ret = fwnode_property_read_u32(child, "reg", &reg);
   755				if (ret)
   756					goto out_flash_release;
   757	
   758				if (reg >= MT6360_MAX_LEDS) {
   759					ret = -EINVAL;
   760					goto out_flash_release;
   761				}
   762			}
   763	
   764			if (priv->leds_active & BIT(reg)) {
   765				ret = -EINVAL;
   766				goto out_flash_release;
   767			}
   768			priv->leds_active |= BIT(reg);
   769	
   770			led->led_no = reg;
   771			led->priv = priv;
   772	
   773			ret = mt6360_init_common_properties(led, &init_data);
   774			if (ret)
   775				goto out_flash_release;
   776	
   777			if (reg == MT6360_VIRTUAL_MULTICOLOR ||
 > 778				(reg >= MT6360_LED_ISNK1 && reg <= MT6360_LED_ISNKML))
   779				ret = mt6360_init_isnk_properties(led, &init_data);
   780			else
   781				ret = mt6360_init_flash_properties(led, &init_data);
   782	
   783			if (ret)
   784				goto out_flash_release;
   785	
   786			ret = mt6360_led_register(&pdev->dev, led, &init_data);
   787			if (ret)
   788				goto out_flash_release;
   789	
   790			i++;
   791		}
   792	
   793		platform_set_drvdata(pdev, priv);
   794		return 0;
   795	
   796	out_flash_release:
   797		mt6360_v4l2_flash_release(priv);
   798		return ret;
   799	}
   800	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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