linux-kernel - drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse: sparse: incorrect type in argument 1 (different address spaces)

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Message-ID: <202311031119.Tu92pPc2-lkp@intel.com>
Date:   Fri, 3 Nov 2023 11:55:37 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sui Jingfeng <suijingfeng@...ngson.cn>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse: sparse:
 incorrect type in argument 1 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   bc3012f4e3a9765de81f454cb8f9bb16aafc6ff5
commit: f39db26c54281da6a785259498ca74b5e470476f drm: Add kms driver for loongson display controller
date:   4 months ago
config: mips-randconfig-r121-20231102 (https://download.01.org/0day-ci/archive/20231103/202311031119.Tu92pPc2-lkp@intel.com/config)
compiler: mips-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231103/202311031119.Tu92pPc2-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311031119.Tu92pPc2-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *dst @@     got void *kptr @@
   drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse:     expected void volatile [noderef] __iomem *dst
   drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse:     got void *kptr
>> drivers/gpu/drm/loongson/lsdc_benchmark.c:42:51: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void const volatile [noderef] __iomem *src @@     got void *kptr @@
   drivers/gpu/drm/loongson/lsdc_benchmark.c:42:51: sparse:     expected void const volatile [noderef] __iomem *src
   drivers/gpu/drm/loongson/lsdc_benchmark.c:42:51: sparse:     got void *kptr

vim +27 drivers/gpu/drm/loongson/lsdc_benchmark.c

    12	
    13	typedef void (*lsdc_copy_proc_t)(struct lsdc_bo *src_bo,
    14					 struct lsdc_bo *dst_bo,
    15					 unsigned int size,
    16					 int n);
    17	
    18	static void lsdc_copy_gtt_to_vram_cpu(struct lsdc_bo *src_bo,
    19					      struct lsdc_bo *dst_bo,
    20					      unsigned int size,
    21					      int n)
    22	{
    23		lsdc_bo_kmap(src_bo);
    24		lsdc_bo_kmap(dst_bo);
    25	
    26		while (n--)
  > 27			memcpy_toio(dst_bo->kptr, src_bo->kptr, size);
    28	
    29		lsdc_bo_kunmap(src_bo);
    30		lsdc_bo_kunmap(dst_bo);
    31	}
    32	
    33	static void lsdc_copy_vram_to_gtt_cpu(struct lsdc_bo *src_bo,
    34					      struct lsdc_bo *dst_bo,
    35					      unsigned int size,
    36					      int n)
    37	{
    38		lsdc_bo_kmap(src_bo);
    39		lsdc_bo_kmap(dst_bo);
    40	
    41		while (n--)
  > 42			memcpy_fromio(dst_bo->kptr, src_bo->kptr, size);
    43	
    44		lsdc_bo_kunmap(src_bo);
    45		lsdc_bo_kunmap(dst_bo);
    46	}
    47	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki