[atishp04:dma_non_coherent_v1 28/42] drivers/video/fbdev/starfive/starfive_fb.c:655:9: sparse: sparse: incorrect type in argument 1 (different address spaces)

[atishp04:dma_non_coherent_v1 28/42] drivers/video/fbdev/starfive/starfive_fb.c:655:9: sparse: sparse: incorrect type in argument 1 (different address spaces)

[kernel test robot]

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tree:   https://github.com/atishp04/linux dma_non_coherent_v1
head:   37cdb4f054939f097f3297ec76c1c6738312c577
commit: f857e57c1e8b3b40fdc1dbc46b4318324e04041d [28/42] video: fbdev: starfive: workaround for unavailable pointer of dtb
config: sparc64-randconfig-s032-20210619 (attached as .config)
compiler: sparc64-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: v0.6.3-341-g8af24329-dirty
        # https://github.com/atishp04/linux/commit/f857e57c1e8b3b40fdc1dbc46b4318324e04041d
        git remote add atishp04 https://github.com/atishp04/linux
        git fetch --no-tags atishp04 dma_non_coherent_v1
        git checkout f857e57c1e8b3b40fdc1dbc46b4318324e04041d
        # 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__' W=1 ARCH=sparc64 

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


sparse warnings: (new ones prefixed by >>)
>> drivers/video/fbdev/starfive/starfive_fb.c:655:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void * @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/starfive/starfive_fb.c:655:9: sparse:     expected void *
   drivers/video/fbdev/starfive/starfive_fb.c:655:9: sparse:     got char [noderef] __iomem *screen_base

vim +655 drivers/video/fbdev/starfive/starfive_fb.c

   638	
   639	static int sf_fb_map_video_memory(struct sf_fb_data *sf_dev)
   640	{
   641		struct resource res_mem;
   642		struct device_node *node;
   643	
   644		node = of_parse_phandle(sf_dev->dev->of_node, "memory-region", 0);
   645		if(node) {
   646			of_address_to_resource(node, 0, &res_mem);
   647			sf_dev->fb.screen_size = resource_size(&res_mem);
   648			sf_dev->fb.fix.smem_start = res_mem.start;
   649		} else {
   650			dev_err(sf_dev->dev, "Could not get reserved memory.\n");
   651			return -ENOMEM;
   652		}
   653	
   654		sf_dev->fb.screen_base = devm_ioremap_resource(sf_dev->dev, &res_mem);
 > 655		memset(sf_dev->fb.screen_base, 0, sf_dev->fb.screen_size);
   656	
   657		return 0;
   658	}
   659	

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

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Re: [atishp04:dma_non_coherent_v1 28/42] drivers/video/fbdev/starfive/starfive_fb.c:655:9: sparse: sparse: incorrect type in argument 1 (different address spaces)

[david.li]

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Please update the code from the following gitup,

Our code on GitHub doesn't have this warning

https://github.com/starfive-tech/freelight-u-sdk

Reported-by: kernel test robot <lkp@intel.com>