drivers/gpu/drm/nouveau/nouveau_dmem.c:404:25: sparse: sparse: cast removes address space '__iomem' of expression

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   61556703b610a104de324e4f061dc6cf7b218b46
commit: 71e741ad124d07b15d7f1cd481f98d69867ca0a2 drm/nouveau/svm: convert migrate_copy to new push macros
date:   7 months ago
config: x86_64-randconfig-s022-20210206 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-215-g0fb77bb6-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=71e741ad124d07b15d7f1cd481f98d69867ca0a2
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 71e741ad124d07b15d7f1cd481f98d69867ca0a2
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

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


"sparse warnings: (new ones prefixed by >>)"
>> drivers/gpu/drm/nouveau/nouveau_dmem.c:404:25: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/gpu/drm/nouveau/nouveau_dmem.c:404:25: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:407:25: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:407:25: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:418:25: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:418:25: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:421:25: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:421:25: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:429:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:429:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:429:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:429:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:429:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:429:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:429:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:429:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:429:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:437:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/nouveau_dmem.c:437:9: sparse: sparse: cast removes address space '__iomem' of expression

vim +/__iomem +404 drivers/gpu/drm/nouveau/nouveau_dmem.c

   383	
   384	static int
   385	nvc0b5_migrate_copy(struct nouveau_drm *drm, u64 npages,
   386			    enum nouveau_aper dst_aper, u64 dst_addr,
   387			    enum nouveau_aper src_aper, u64 src_addr)
   388	{
   389		struct nvif_push *push = drm->dmem->migrate.chan->chan.push;
   390		u32 launch_dma = (1 << 9) /* MULTI_LINE_ENABLE. */ |
   391				 (1 << 8) /* DST_MEMORY_LAYOUT_PITCH. */ |
   392				 (1 << 7) /* SRC_MEMORY_LAYOUT_PITCH. */ |
   393				 (1 << 2) /* FLUSH_ENABLE_TRUE. */ |
   394				 (2 << 0) /* DATA_TRANSFER_TYPE_NON_PIPELINED. */;
   395		int ret;
   396	
   397		ret = PUSH_WAIT(push, 13);
   398		if (ret)
   399			return ret;
   400	
   401		if (src_aper != NOUVEAU_APER_VIRT) {
   402			switch (src_aper) {
   403			case NOUVEAU_APER_VRAM:
 > 404				PUSH_NVIM(push, NVA0B5, 0x0260, 0);
   405				break;
   406			case NOUVEAU_APER_HOST:
   407				PUSH_NVIM(push, NVA0B5, 0x0260, 1);
   408				break;
   409			default:
   410				return -EINVAL;
   411			}
   412			launch_dma |= 0x00001000; /* SRC_TYPE_PHYSICAL. */
   413		}
   414	
   415		if (dst_aper != NOUVEAU_APER_VIRT) {
   416			switch (dst_aper) {
   417			case NOUVEAU_APER_VRAM:
   418				PUSH_NVIM(push, NVA0B5, 0x0264, 0);
   419				break;
   420			case NOUVEAU_APER_HOST:
   421				PUSH_NVIM(push, NVA0B5, 0x0264, 1);
   422				break;
   423			default:
   424				return -EINVAL;
   425			}
   426			launch_dma |= 0x00002000; /* DST_TYPE_PHYSICAL. */
   427		}
   428	
   429		PUSH_NVSQ(push, NVA0B5, 0x0400, upper_32_bits(src_addr),
   430					0x0404, lower_32_bits(src_addr),
   431					0x0408, upper_32_bits(dst_addr),
   432					0x040c, lower_32_bits(dst_addr),
   433					0x0410, PAGE_SIZE,
   434					0x0414, PAGE_SIZE,
   435					0x0418, PAGE_SIZE,
   436					0x041c, npages);
   437		PUSH_NVSQ(push, NVA0B5, 0x0300, launch_dma);
   438		return 0;
   439	}
   440	

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

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