linux-kernel - drivers/gpu/drm/msm/msm_io_utils.c:65:31: sparse: sparse: incorrect type in return expression (different address spaces)

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Date:   Tue, 5 Apr 2022 20:49:45 +0800
From:   kernel test robot <lkp@...el.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Jessica Zhang <quic_jesszhan@...cinc.com>
Subject: drivers/gpu/drm/msm/msm_io_utils.c:65:31: sparse: sparse: incorrect
 type in return expression (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3123109284176b1532874591f7c81f3837bbdc17
commit: d89e5028346bd80f79c3073d132123e7a17e1177 drm/msm: move utility functions from msm_drv.c
date:   7 weeks ago
config: sparc64-randconfig-s031-20220405 (https://download.01.org/0day-ci/archive/20220405/202204052038.RxcTSgob-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 11.2.0
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: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d89e5028346bd80f79c3073d132123e7a17e1177
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d89e5028346bd80f79c3073d132123e7a17e1177
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=sparc64 SHELL=/bin/bash drivers/gpu/drm/msm/

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


sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/msm/msm_io_utils.c:65:31: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void [noderef] __iomem * @@     got void * @@
   drivers/gpu/drm/msm/msm_io_utils.c:65:31: sparse:     expected void [noderef] __iomem *
   drivers/gpu/drm/msm/msm_io_utils.c:65:31: sparse:     got void *
   drivers/gpu/drm/msm/msm_io_utils.c:74:31: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void [noderef] __iomem * @@     got void * @@
   drivers/gpu/drm/msm/msm_io_utils.c:74:31: sparse:     expected void [noderef] __iomem *
   drivers/gpu/drm/msm/msm_io_utils.c:74:31: sparse:     got void *

vim +65 drivers/gpu/drm/msm/msm_io_utils.c

    49	
    50	static void __iomem *_msm_ioremap(struct platform_device *pdev, const char *name,
    51					  bool quiet, phys_addr_t *psize)
    52	{
    53		struct resource *res;
    54		unsigned long size;
    55		void __iomem *ptr;
    56	
    57		if (name)
    58			res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
    59		else
    60			res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    61	
    62		if (!res) {
    63			if (!quiet)
    64				DRM_DEV_ERROR(&pdev->dev, "failed to get memory resource: %s\n", name);
  > 65			return ERR_PTR(-EINVAL);
    66		}
    67	
    68		size = resource_size(res);
    69	
    70		ptr = devm_ioremap(&pdev->dev, res->start, size);
    71		if (!ptr) {
    72			if (!quiet)
    73				DRM_DEV_ERROR(&pdev->dev, "failed to ioremap: %s\n", name);
    74			return ERR_PTR(-ENOMEM);
    75		}
    76	
    77		if (psize)
    78			*psize = size;
    79	
    80		return ptr;
    81	}
    82	

-- 
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https://01.org/lkp