[asahilinux:bits/200-dcp 46/178] drivers/gpu/drm/apple/dptxep.c:204:26: sparse: sparse: cast from restricted __le64

[asahilinux:bits/200-dcp 46/178] drivers/gpu/drm/apple/dptxep.c:204:26: sparse: sparse: cast from restricted __le64

[kernel test robot]

tree:   https://github.com/AsahiLinux/linux bits/200-dcp
head:   4b1d0b029fb1b7f93e72be2d9553a358b8054d7c
commit: e195c24325c721ace3005a5ffe668e0870ec7138 [46/178] drm: apple: dptx: Add set_active_lanes APCALL
config: arm64-randconfig-r132-20260512 (https://download.01.org/0day-ci/archive/20260512/202605121832.9hBUgwvF-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 8.5.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260512/202605121832.9hBUgwvF-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/202605121832.9hBUgwvF-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/apple/dptxep.c:204:26: sparse: sparse: cast from restricted __le64
>> drivers/gpu/drm/apple/dptxep.c:204:26: sparse: sparse: incorrect type in initializer (different base types) @@     expected unsigned long long [usertype] lane_count @@     got restricted __le64 [usertype] @@
   drivers/gpu/drm/apple/dptxep.c:204:26: sparse:     expected unsigned long long [usertype] lane_count
   drivers/gpu/drm/apple/dptxep.c:204:26: sparse:     got restricted __le64 [usertype]

vim +204 drivers/gpu/drm/apple/dptxep.c

   188	
   189	static int dptxport_call_set_active_lane_count(struct apple_epic_service *service,
   190						       const void *data, size_t data_size,
   191						       void *reply_, size_t reply_size)
   192	{
   193		struct dptx_port *dptx = service->cookie;
   194		const struct dptxport_apcall_set_active_lane_count *request = data;
   195		struct dptxport_apcall_set_active_lane_count *reply = reply_;
   196		int ret = 0;
   197		int retcode = 0;
   198	
   199		if (reply_size < sizeof(*reply))
   200			return -1;
   201		if (data_size < sizeof(*request))
   202			return -1;
   203	
 > 204		u64 lane_count = cpu_to_le64(request->lane_count);
   205	
   206		switch (lane_count) {
   207		case 0 ... 2:
   208		case 4:
   209			dptx->phy_ops.dp.lanes = lane_count;
   210			dptx->phy_ops.dp.set_lanes = 1;
   211			break;
   212		default:
   213			dev_err(service->ep->dcp->dev, "set_active_lane_count: invalid lane count:%llu\n", lane_count);
   214			retcode = 1;
   215			lane_count = 0;
   216			break;
   217		}
   218	
   219		if (dptx->phy_ops.dp.set_lanes) {
   220			if (dptx->atcphy) {
   221				ret = phy_configure(dptx->atcphy, &dptx->phy_ops);
   222				if (ret)
   223					return ret;
   224			}
   225			dptx->phy_ops.dp.set_lanes = 0;
   226		}
   227	
   228		reply->retcode = cpu_to_le32(retcode);
   229		reply->lane_count = cpu_to_le64(lane_count);
   230	
   231		return ret;
   232	}
   233	

-- 
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https://github.com/intel/lkp-tests/wiki