drivers/mmc/host/sdhci-of-esdhc.c:900:33: sparse: sparse: incorrect type in argument 1 (different address spaces)

[kernel test robot]

Hi Krzysztof,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2c85ebc57b3e1817b6ce1a6b703928e113a90442
commit: 54d8454436a205682bd89d66d8d9eedbc8452d15 mmc: host: Enable compile testing of multiple drivers
date:   3 months ago
config: openrisc-randconfig-s031-20201214 (attached as .config)
compiler: or1k-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-184-g1b896707-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=54d8454436a205682bd89d66d8d9eedbc8452d15
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 54d8454436a205682bd89d66d8d9eedbc8452d15
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=openrisc 

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


"sparse warnings: (new ones prefixed by >>)"
>> drivers/mmc/host/sdhci-of-esdhc.c:900:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *addr @@     got void [noderef] __iomem *[assigned] scfg_base @@
   drivers/mmc/host/sdhci-of-esdhc.c:900:33: sparse:     expected void *addr
   drivers/mmc/host/sdhci-of-esdhc.c:900:33: sparse:     got void [noderef] __iomem *[assigned] scfg_base

vim +900 drivers/mmc/host/sdhci-of-esdhc.c

ea35645a3c66a74 yangbo lu 2017-04-20  858  
ea35645a3c66a74 yangbo lu 2017-04-20  859  static int esdhc_signal_voltage_switch(struct mmc_host *mmc,
ea35645a3c66a74 yangbo lu 2017-04-20  860  				       struct mmc_ios *ios)
ea35645a3c66a74 yangbo lu 2017-04-20  861  {
ea35645a3c66a74 yangbo lu 2017-04-20  862  	struct sdhci_host *host = mmc_priv(mmc);
ea35645a3c66a74 yangbo lu 2017-04-20  863  	struct device_node *scfg_node;
ea35645a3c66a74 yangbo lu 2017-04-20  864  	void __iomem *scfg_base = NULL;
ea35645a3c66a74 yangbo lu 2017-04-20  865  	u32 sdhciovselcr;
ea35645a3c66a74 yangbo lu 2017-04-20  866  	u32 val;
ea35645a3c66a74 yangbo lu 2017-04-20  867  
ea35645a3c66a74 yangbo lu 2017-04-20  868  	/*
ea35645a3c66a74 yangbo lu 2017-04-20  869  	 * Signal Voltage Switching is only applicable for Host Controllers
ea35645a3c66a74 yangbo lu 2017-04-20  870  	 * v3.00 and above.
ea35645a3c66a74 yangbo lu 2017-04-20  871  	 */
ea35645a3c66a74 yangbo lu 2017-04-20  872  	if (host->version < SDHCI_SPEC_300)
ea35645a3c66a74 yangbo lu 2017-04-20  873  		return 0;
ea35645a3c66a74 yangbo lu 2017-04-20  874  
ea35645a3c66a74 yangbo lu 2017-04-20  875  	val = sdhci_readl(host, ESDHC_PROCTL);
ea35645a3c66a74 yangbo lu 2017-04-20  876  
ea35645a3c66a74 yangbo lu 2017-04-20  877  	switch (ios->signal_voltage) {
ea35645a3c66a74 yangbo lu 2017-04-20  878  	case MMC_SIGNAL_VOLTAGE_330:
ea35645a3c66a74 yangbo lu 2017-04-20  879  		val &= ~ESDHC_VOLT_SEL;
ea35645a3c66a74 yangbo lu 2017-04-20  880  		sdhci_writel(host, val, ESDHC_PROCTL);
ea35645a3c66a74 yangbo lu 2017-04-20  881  		return 0;
ea35645a3c66a74 yangbo lu 2017-04-20  882  	case MMC_SIGNAL_VOLTAGE_180:
ea35645a3c66a74 yangbo lu 2017-04-20  883  		scfg_node = of_find_matching_node(NULL, scfg_device_ids);
ea35645a3c66a74 yangbo lu 2017-04-20  884  		if (scfg_node)
ea35645a3c66a74 yangbo lu 2017-04-20  885  			scfg_base = of_iomap(scfg_node, 0);
ea35645a3c66a74 yangbo lu 2017-04-20  886  		if (scfg_base) {
ea35645a3c66a74 yangbo lu 2017-04-20  887  			sdhciovselcr = SDHCIOVSELCR_TGLEN |
ea35645a3c66a74 yangbo lu 2017-04-20  888  				       SDHCIOVSELCR_VSELVAL;
ea35645a3c66a74 yangbo lu 2017-04-20  889  			iowrite32be(sdhciovselcr,
ea35645a3c66a74 yangbo lu 2017-04-20  890  				scfg_base + SCFG_SDHCIOVSELCR);
ea35645a3c66a74 yangbo lu 2017-04-20  891  
ea35645a3c66a74 yangbo lu 2017-04-20  892  			val |= ESDHC_VOLT_SEL;
ea35645a3c66a74 yangbo lu 2017-04-20  893  			sdhci_writel(host, val, ESDHC_PROCTL);
ea35645a3c66a74 yangbo lu 2017-04-20  894  			mdelay(5);
ea35645a3c66a74 yangbo lu 2017-04-20  895  
ea35645a3c66a74 yangbo lu 2017-04-20  896  			sdhciovselcr = SDHCIOVSELCR_TGLEN |
ea35645a3c66a74 yangbo lu 2017-04-20  897  				       SDHCIOVSELCR_SDHC_VS;
ea35645a3c66a74 yangbo lu 2017-04-20  898  			iowrite32be(sdhciovselcr,
ea35645a3c66a74 yangbo lu 2017-04-20  899  				scfg_base + SCFG_SDHCIOVSELCR);
ea35645a3c66a74 yangbo lu 2017-04-20 @900  			iounmap(scfg_base);
ea35645a3c66a74 yangbo lu 2017-04-20  901  		} else {
ea35645a3c66a74 yangbo lu 2017-04-20  902  			val |= ESDHC_VOLT_SEL;
ea35645a3c66a74 yangbo lu 2017-04-20  903  			sdhci_writel(host, val, ESDHC_PROCTL);
ea35645a3c66a74 yangbo lu 2017-04-20  904  		}
ea35645a3c66a74 yangbo lu 2017-04-20  905  		return 0;
ea35645a3c66a74 yangbo lu 2017-04-20  906  	default:
ea35645a3c66a74 yangbo lu 2017-04-20  907  		return 0;
ea35645a3c66a74 yangbo lu 2017-04-20  908  	}
ea35645a3c66a74 yangbo lu 2017-04-20  909  }
ea35645a3c66a74 yangbo lu 2017-04-20  910  

:::::: The code at line 900 was first introduced by commit
:::::: ea35645a3c66a74af92d3bbb4eb131220fc3e58a mmc: sdhci-of-esdhc: add support for signal voltage switch

:::::: TO: yangbo lu <yangbo.lu@xxxxxxx>
:::::: CC: Ulf Hansson <ulf.hansson@xxxxxxxxxx>

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

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