linux-kernel - drivers/remoteproc/rcar_rproc.c:28:12: sparse: sparse: incorrect type in assignment (different address spaces)

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Date:   Tue, 1 Feb 2022 00:21:21 +0800
From:   kernel test robot <lkp@...el.com>
To:     Julien Massot <julien.massot@....bzh>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Mathieu Poirier <mathieu.poirier@...aro.org>
Subject: drivers/remoteproc/rcar_rproc.c:28:12: sparse: sparse: incorrect
 type in assignment (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   26291c54e111ff6ba87a164d85d4a4e134b7315c
commit: 285892a74f1370a12249f765c6a4e3b16194852e remoteproc: Add Renesas rcar driver
date:   7 weeks ago
config: ia64-randconfig-s032-20220130 (https://download.01.org/0day-ci/archive/20220201/202202010048.Xq8X0kfI-lkp@intel.com/config)
compiler: ia64-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=285892a74f1370a12249f765c6a4e3b16194852e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 285892a74f1370a12249f765c6a4e3b16194852e
        # 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=ia64 SHELL=/bin/bash drivers/remoteproc/

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/remoteproc/rcar_rproc.c:28:12: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *va @@     got void [noderef] __iomem * @@
   drivers/remoteproc/rcar_rproc.c:28:12: sparse:     expected void *va
   drivers/remoteproc/rcar_rproc.c:28:12: sparse:     got void [noderef] __iomem *
>> drivers/remoteproc/rcar_rproc.c:45:20: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got void *va @@
   drivers/remoteproc/rcar_rproc.c:45:20: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/remoteproc/rcar_rproc.c:45:20: sparse:     got void *va

vim +28 drivers/remoteproc/rcar_rproc.c

    20	
    21	static int rcar_rproc_mem_alloc(struct rproc *rproc,
    22					 struct rproc_mem_entry *mem)
    23	{
    24		struct device *dev = &rproc->dev;
    25		void *va;
    26	
    27		dev_dbg(dev, "map memory: %pa+%zx\n", &mem->dma, mem->len);
  > 28		va = ioremap_wc(mem->dma, mem->len);
    29		if (!va) {
    30			dev_err(dev, "Unable to map memory region: %pa+%zx\n",
    31				&mem->dma, mem->len);
    32			return -ENOMEM;
    33		}
    34	
    35		/* Update memory entry va */
    36		mem->va = va;
    37	
    38		return 0;
    39	}
    40	
    41	static int rcar_rproc_mem_release(struct rproc *rproc,
    42					   struct rproc_mem_entry *mem)
    43	{
    44		dev_dbg(&rproc->dev, "unmap memory: %pa\n", &mem->dma);
  > 45		iounmap(mem->va);
    46	
    47		return 0;
    48	}
    49	

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