linux-kernel - Re: [PATCH] iio: adc: mt6370: Fix ibus and ibat scaling value of some specific vendor ID chips

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Date:   Thu, 30 Mar 2023 18:27:50 +0300
From:   Dan Carpenter <error27@...il.com>
To:     oe-kbuild@...ts.linux.dev, ChiaEn Wu <chiaen_wu@...htek.com>,
        jic23@...nel.org, lars@...afoo.de, matthias.bgg@...il.com,
        angelogioacchino.delregno@...labora.com
Cc:     lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, peterwu.pub@...il.com,
        cy_huang@...htek.com, ChiaEn Wu <chiaen_wu@...htek.com>
Subject: Re: [PATCH] iio: adc: mt6370: Fix ibus and ibat scaling value of
 some specific vendor ID chips

Hi ChiaEn,

https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/ChiaEn-Wu/iio-adc-mt6370-Fix-ibus-and-ibat-scaling-value-of-some-specific-vendor-ID-chips/20230324-221545
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/1679667167-16261-1-git-send-email-chiaen_wu%40richtek.com
patch subject: [PATCH] iio: adc: mt6370: Fix ibus and ibat scaling value of some specific vendor ID chips
config: m68k-randconfig-m041-20230329 (https://download.01.org/0day-ci/archive/20230330/202303302231.gNdPKrtD-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.1.0

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Reported-by: Dan Carpenter <error27@...il.com>
| Link: https://lore.kernel.org/r/202303302231.gNdPKrtD-lkp@intel.com/

smatch warnings:
drivers/iio/adc/mt6370-adc.c:306 mt6370_adc_probe() error: uninitialized symbol 'priv'.

vim +/priv +306 drivers/iio/adc/mt6370-adc.c

c1404d1b659fe3d ChiaEn Wu 2022-10-11  294  static int mt6370_adc_probe(struct platform_device *pdev)
c1404d1b659fe3d ChiaEn Wu 2022-10-11  295  {
c1404d1b659fe3d ChiaEn Wu 2022-10-11  296  	struct device *dev = &pdev->dev;
c1404d1b659fe3d ChiaEn Wu 2022-10-11  297  	struct mt6370_adc_data *priv;
c1404d1b659fe3d ChiaEn Wu 2022-10-11  298  	struct iio_dev *indio_dev;
c1404d1b659fe3d ChiaEn Wu 2022-10-11  299  	struct regmap *regmap;
c1404d1b659fe3d ChiaEn Wu 2022-10-11  300  	int ret;
c1404d1b659fe3d ChiaEn Wu 2022-10-11  301  
c1404d1b659fe3d ChiaEn Wu 2022-10-11  302  	regmap = dev_get_regmap(pdev->dev.parent, NULL);
c1404d1b659fe3d ChiaEn Wu 2022-10-11  303  	if (!regmap)
c1404d1b659fe3d ChiaEn Wu 2022-10-11  304  		return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
c1404d1b659fe3d ChiaEn Wu 2022-10-11  305  
9822359d5de2dba ChiaEn Wu 2023-03-24 @306  	ret = mt6370_get_vendor_info(priv);

"priv" is uninitialized.

9822359d5de2dba ChiaEn Wu 2023-03-24  307  	if (ret)
9822359d5de2dba ChiaEn Wu 2023-03-24  308  		return dev_err_probe(dev, ret, "Failed to get vid\n");
9822359d5de2dba ChiaEn Wu 2023-03-24  309  
c1404d1b659fe3d ChiaEn Wu 2022-10-11  310  	indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
c1404d1b659fe3d ChiaEn Wu 2022-10-11  311  	if (!indio_dev)
c1404d1b659fe3d ChiaEn Wu 2022-10-11  312  		return -ENOMEM;
c1404d1b659fe3d ChiaEn Wu 2022-10-11  313  
c1404d1b659fe3d ChiaEn Wu 2022-10-11  314  	priv = iio_priv(indio_dev);
                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^

c1404d1b659fe3d ChiaEn Wu 2022-10-11  315  	priv->dev = dev;
c1404d1b659fe3d ChiaEn Wu 2022-10-11  316  	priv->regmap = regmap;
c1404d1b659fe3d ChiaEn Wu 2022-10-11  317  	mutex_init(&priv->adc_lock);

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests