linux-kernel - drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:40:17: sparse: sparse: cast removes address space '_

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Message-ID: <202311040149.o3KPXEV2-lkp@intel.com>
Date:   Sat, 4 Nov 2023 01:36:36 +0800
From:   kernel test robot <lkp@...el.com>
To:     Lyude Paul <lyude@...hat.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Karol Herbst <kherbst@...hat.com>,
        Ben Skeggs <bskeggs@...hat.com>
Subject: drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:40:17: sparse: sparse:
 cast removes address space '__iomem' of expression

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8f6f76a6a29f36d2f3e4510d0bde5046672f6924
commit: 57cbdbe65e5f9ba9bfd67b66bc3ce24ef1c54643 drm/nouveau/kms/nv140-: Use hard-coded wndws or core channel for CRC channel
date:   2 years ago
config: x86_64-randconfig-123-20231101 (https://download.01.org/0day-ci/archive/20231104/202311040149.o3KPXEV2-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231104/202311040149.o3KPXEV2-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/202311040149.o3KPXEV2-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:40:17: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:40:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:41:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:41:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:43:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:43:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:44:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/dispnv50/crcc57d.c:44:17: sparse: sparse: cast removes address space '__iomem' of expression

vim +/__iomem +40 drivers/gpu/drm/nouveau/dispnv50/crcc57d.c

    12	
    13	static int crcc57d_set_src(struct nv50_head *head, int or, enum nv50_crc_source_type source,
    14				   struct nv50_crc_notifier_ctx *ctx)
    15	{
    16		struct nvif_push *push = nv50_disp(head->base.base.dev)->core->chan.push;
    17		const int i = head->base.index;
    18		u32 crc_args = NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, CONTROLLING_CHANNEL, CORE) |
    19			       NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, EXPECT_BUFFER_COLLAPSE, FALSE) |
    20			       NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, SECONDARY_CRC, NONE) |
    21			       NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, CRC_DURING_SNOOZE, DISABLE);
    22		int ret;
    23	
    24		switch (source) {
    25		case NV50_CRC_SOURCE_TYPE_SOR:
    26			crc_args |= NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, PRIMARY_CRC, SOR(or));
    27			break;
    28		case NV50_CRC_SOURCE_TYPE_SF:
    29			crc_args |= NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, PRIMARY_CRC, SF);
    30			break;
    31		default:
    32			break;
    33		}
    34	
    35		ret = PUSH_WAIT(push, 4);
    36		if (ret)
    37			return ret;
    38	
    39		if (source) {
  > 40			PUSH_MTHD(push, NVC57D, HEAD_SET_CONTEXT_DMA_CRC(i), ctx->ntfy.handle);
    41			PUSH_MTHD(push, NVC57D, HEAD_SET_CRC_CONTROL(i), crc_args);
    42		} else {
    43			PUSH_MTHD(push, NVC57D, HEAD_SET_CRC_CONTROL(i), 0);
    44			PUSH_MTHD(push, NVC57D, HEAD_SET_CONTEXT_DMA_CRC(i), 0);
    45		}
    46	
    47		return 0;
    48	}
    49	

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