linux-kernel - drivers/gpu/drm/msm/dp/dp_display.c:1313:39: sparse: sparse: incompatible types in comparison expression (different address spaces):

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Message-ID: <202512131656.sgDxurSb-lkp@intel.com>
Date: Sat, 13 Dec 2025 16:29:05 +0800
From: kernel test robot <lkp@...el.com>
To: Dmitry Baryshkov <lumag@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Stephen Boyd <swboyd@...omium.org>
Subject: drivers/gpu/drm/msm/dp/dp_display.c:1313:39: sparse: sparse:
 incompatible types in comparison expression (different address spaces):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a859eca0e4cc96f63ff125dbe5388d961558b0e9
commit: 603fc0fc30bf69e78a7a5febdb1431bd49d87f22 drm/msm/dp: drop the msm_dp_catalog module
date:   5 months ago
config: arm64-randconfig-r113-20251213 (https://download.01.org/0day-ci/archive/20251213/202512131656.sgDxurSb-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 12.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251213/202512131656.sgDxurSb-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/202512131656.sgDxurSb-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/msm/dp/dp_display.c:1313:39: sparse: sparse: incompatible types in comparison expression (different address spaces):
   drivers/gpu/drm/msm/dp/dp_display.c:1313:39: sparse:    void [noderef] __iomem *
   drivers/gpu/drm/msm/dp/dp_display.c:1313:39: sparse:    void *

vim +1313 drivers/gpu/drm/msm/dp/dp_display.c

  1302	
  1303	static int msm_dp_display_get_io(struct msm_dp_display_private *display)
  1304	{
  1305		struct platform_device *pdev = display->msm_dp_display.pdev;
  1306	
  1307		display->ahb_base = msm_dp_ioremap(pdev, 0, &display->ahb_len);
  1308		if (IS_ERR(display->ahb_base))
  1309			return PTR_ERR(display->ahb_base);
  1310	
  1311		display->aux_base = msm_dp_ioremap(pdev, 1, &display->aux_len);
  1312		if (IS_ERR(display->aux_base)) {
> 1313			if (display->aux_base != ERR_PTR(-EINVAL)) {
  1314				DRM_ERROR("unable to remap aux region: %pe\n", display->aux_base);
  1315				return PTR_ERR(display->aux_base);
  1316			}
  1317	
  1318			/*
  1319			 * The initial binding had a single reg, but in order to
  1320			 * support variation in the sub-region sizes this was split.
  1321			 * msm_dp_ioremap() will fail with -EINVAL here if only a single
  1322			 * reg is specified, so fill in the sub-region offsets and
  1323			 * lengths based on this single region.
  1324			 */
  1325			if (display->ahb_len < DP_DEFAULT_P0_OFFSET + DP_DEFAULT_P0_SIZE) {
  1326				DRM_ERROR("legacy memory region not large enough\n");
  1327				return -EINVAL;
  1328			}
  1329	
  1330			display->ahb_len = DP_DEFAULT_AHB_SIZE;
  1331			display->aux_base = display->ahb_base + DP_DEFAULT_AUX_OFFSET;
  1332			display->aux_len = DP_DEFAULT_AUX_SIZE;
  1333			display->link_base = display->ahb_base + DP_DEFAULT_LINK_OFFSET;
  1334			display->link_len = DP_DEFAULT_LINK_SIZE;
  1335			display->p0_base = display->ahb_base + DP_DEFAULT_P0_OFFSET;
  1336			display->p0_len = DP_DEFAULT_P0_SIZE;
  1337	
  1338			return 0;
  1339		}
  1340	
  1341		display->link_base = msm_dp_ioremap(pdev, 2, &display->link_len);
  1342		if (IS_ERR(display->link_base)) {
  1343			DRM_ERROR("unable to remap link region: %pe\n", display->link_base);
  1344			return PTR_ERR(display->link_base);
  1345		}
  1346	
  1347		display->p0_base = msm_dp_ioremap(pdev, 3, &display->p0_len);
  1348		if (IS_ERR(display->p0_base)) {
  1349			DRM_ERROR("unable to remap p0 region: %pe\n", display->p0_base);
  1350			return PTR_ERR(display->p0_base);
  1351		}
  1352	
  1353		return 0;
  1354	}
  1355	

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