sound/soc/codecs/ak4642.c:646:24: sparse: sparse: Using plain integer as NULL pointer

sound/soc/codecs/ak4642.c:646:24: sparse: sparse: Using plain integer as NULL pointer

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8018e02a87031a5e8afcbd9d35133edd520076bb
commit: 3cd8cc98d63492f6f69edd4486c9bd1fe29f91c3 platform/x86: Drop the PMC_ATOM Kconfig option
date:   1 year, 3 months ago
config: i386-randconfig-061-20230923 (https://download.01.org/0day-ci/archive/20230923/202309230808.muWc0Phh-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230923/202309230808.muWc0Phh-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309230808.muWc0Phh-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> sound/soc/codecs/ak4642.c:646:24: sparse: sparse: Using plain integer as NULL pointer

vim +646 sound/soc/codecs/ak4642.c

171a0138ab75fc Kuninori Morimoto 2015-09-10  631  
27204ca8b98116 Kiran Padwal      2014-07-28  632  static const struct of_device_id ak4642_of_match[];
e654a1331f6855 Stephen Kitt      2022-04-15  633  static const struct i2c_device_id ak4642_i2c_id[];
e654a1331f6855 Stephen Kitt      2022-04-15  634  static int ak4642_i2c_probe(struct i2c_client *i2c)
a3a83d9a7cb0ce Kuninori Morimoto 2009-08-21  635  {
2719a752b6e96b Kuninori Morimoto 2015-09-10  636  	struct device *dev = &i2c->dev;
2719a752b6e96b Kuninori Morimoto 2015-09-10  637  	struct device_node *np = dev->of_node;
d815c703cedbc7 Sascha Hauer      2014-05-14  638  	const struct ak4642_drvdata *drvdata = NULL;
4574cd94a717ef Mark Brown        2013-11-28  639  	struct regmap *regmap;
d815c703cedbc7 Sascha Hauer      2014-05-14  640  	struct ak4642_priv *priv;
171a0138ab75fc Kuninori Morimoto 2015-09-10  641  	struct clk *mcko = NULL;
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  642  
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  643  	if (np) {
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  644  		const struct of_device_id *of_id;
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  645  
171a0138ab75fc Kuninori Morimoto 2015-09-10 @646  		mcko = ak4642_of_parse_mcko(dev);
171a0138ab75fc Kuninori Morimoto 2015-09-10  647  		if (IS_ERR(mcko))
171a0138ab75fc Kuninori Morimoto 2015-09-10  648  			mcko = NULL;
171a0138ab75fc Kuninori Morimoto 2015-09-10  649  
2719a752b6e96b Kuninori Morimoto 2015-09-10  650  		of_id = of_match_device(ak4642_of_match, dev);
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  651  		if (of_id)
d815c703cedbc7 Sascha Hauer      2014-05-14  652  			drvdata = of_id->data;
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  653  	} else {
e654a1331f6855 Stephen Kitt      2022-04-15  654  		const struct i2c_device_id *id =
e654a1331f6855 Stephen Kitt      2022-04-15  655  			i2c_match_id(ak4642_i2c_id, i2c);
d815c703cedbc7 Sascha Hauer      2014-05-14  656  		drvdata = (const struct ak4642_drvdata *)id->driver_data;
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  657  	}
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  658  
d815c703cedbc7 Sascha Hauer      2014-05-14  659  	if (!drvdata) {
2719a752b6e96b Kuninori Morimoto 2015-09-10  660  		dev_err(dev, "Unknown device type\n");
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  661  		return -EINVAL;
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  662  	}
bbf1453e28e4e3 Kuninori Morimoto 2013-01-10  663  
2719a752b6e96b Kuninori Morimoto 2015-09-10  664  	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
d815c703cedbc7 Sascha Hauer      2014-05-14  665  	if (!priv)
d815c703cedbc7 Sascha Hauer      2014-05-14  666  		return -ENOMEM;
d815c703cedbc7 Sascha Hauer      2014-05-14  667  
d815c703cedbc7 Sascha Hauer      2014-05-14  668  	priv->drvdata = drvdata;
171a0138ab75fc Kuninori Morimoto 2015-09-10  669  	priv->mcko = mcko;
d815c703cedbc7 Sascha Hauer      2014-05-14  670  
d815c703cedbc7 Sascha Hauer      2014-05-14  671  	i2c_set_clientdata(i2c, priv);
d815c703cedbc7 Sascha Hauer      2014-05-14  672  
d815c703cedbc7 Sascha Hauer      2014-05-14  673  	regmap = devm_regmap_init_i2c(i2c, drvdata->regmap_config);
4574cd94a717ef Mark Brown        2013-11-28  674  	if (IS_ERR(regmap))
4574cd94a717ef Mark Brown        2013-11-28  675  		return PTR_ERR(regmap);
4574cd94a717ef Mark Brown        2013-11-28  676  
43c5d0f05ec55a Kuninori Morimoto 2018-01-29  677  	return devm_snd_soc_register_component(dev,
43c5d0f05ec55a Kuninori Morimoto 2018-01-29  678  				&soc_component_dev_ak4642, &ak4642_dai, 1);
a3a83d9a7cb0ce Kuninori Morimoto 2009-08-21  679  }
a3a83d9a7cb0ce Kuninori Morimoto 2009-08-21  680  

:::::: The code at line 646 was first introduced by commit
:::::: 171a0138ab75fcbe1228c4af0442221efccfb197 ASoC: ak4642: enable to use MCKO as fixed rate output pin on DT

:::::: TO: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
:::::: CC: Mark Brown <broonie@kernel.org>

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