[openeuler:OLK-6.6 1613/1613] arch/loongarch/kernel/dma.c:37:42: sparse: sparse: incorrect type in argument 1 (different address spaces)

[kernel test robot <lkp@intel.com>]

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   d68dc6ee371ec5466be9b2d76bdca0b360940adc
commit: 90d2bbc1ade2216bda17fb582a1aaabf7567478f [1613/1613] LoongArch: use arch specific phys_to_dma
config: loongarch-randconfig-r111-20241210 (https://download.01.org/0day-ci/archive/20241214/202412141716.TzMSDkUc-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20241214/202412141716.TzMSDkUc-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412141716.TzMSDkUc-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/loongarch/kernel/dma.c:37:42: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got void volatile * @@
   arch/loongarch/kernel/dma.c:37:42: sparse:     expected void const volatile [noderef] __iomem *addr
   arch/loongarch/kernel/dma.c:37:42: sparse:     got void volatile *
   arch/loongarch/kernel/dma.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/slab.h, ...):
   include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false

vim +37 arch/loongarch/kernel/dma.c

    29	
    30	void acpi_arch_dma_setup(struct device *dev)
    31	{
    32		int ret;
    33		u64 mask, end = 0;
    34		const struct bus_dma_region *map = NULL;
    35	
    36		if (node_id_offset == 0) {
  > 37			node_id_offset = ((readl(LS7A_DMA_CFG) & LS7A_DMA_NODE_MASK) >> LS7A_DMA_NODE_SHF);
    38			node_id_offset += 36;
    39		}
    40	
    41		ret = acpi_dma_get_range(dev, &map);
    42		if (!ret && map) {
    43			const struct bus_dma_region *r = map;
    44	
    45			for (end = 0; r->size; r++) {
    46				if (r->dma_start + r->size - 1 > end)
    47					end = r->dma_start + r->size - 1;
    48			}
    49	
    50			mask = DMA_BIT_MASK(ilog2(end) + 1);
    51			dev->bus_dma_limit = end;
    52			dev->dma_range_map = map;
    53			dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask);
    54			*dev->dma_mask = min(*dev->dma_mask, mask);
    55		}
    56	

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