tree: https://github.com/intel/linux-intel-lts.git 5.4/yocto head: eeb611e5394c56d45c5cc8f7dc484c9f19e93143 commit: ed60485d05462b4c58e219b174c859bc66741e91 [2/1142] keembay-ocs: Add support for Keem Bay OCS config: ia64-randconfig-s031-20201111 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-106-gd020cf33-dirty # https://github.com/intel/linux-intel-lts/commit/ed60485d05462b4c58e219b17... git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-linux-intel-lts 5.4/yocto git checkout ed60485d05462b4c58e219b174c859bc66741e91 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" vim +1379 drivers/crypto/keembay/ocs-aes.c 1290 1291 void ocs_create_linked_list_from_sg(struct ocs_aes_dev *aes_dev, 1292 struct scatterlist *sgl, u32 num_sgl_entries, 1293 u8 **aad_buf, dma_addr_t *aad_descriptor, 1294 u32 aad_size, u32 *aad_desc_size, 1295 u8 **data_buf, dma_addr_t *data_descriptor, 1296 u32 data_size, u32 *data_desc_size) 1297 { 1298 struct ocs_dma_linked_list *ll = NULL; 1299 u32 data_offset = 0; 1300 struct scatterlist *sg; 1301 int num_aad_ents, i; 1302 1303 if (num_sgl_entries == 0) 1304 goto ret_err; 1305 1306 sg = sgl; 1307 1308 if (aad_size) { 1309 num_aad_ents = sg_nents_for_len(sgl, aad_size); 1310 if (num_aad_ents < 0) 1311 goto ret_err; 1312 1313 *aad_desc_size = sizeof(struct ocs_dma_linked_list) * 1314 num_aad_ents; 1315 1316 /* HW requirement: descriptor must be 8 byte aligned */ 1317 *aad_buf = kmalloc(*aad_desc_size, GFP_KERNEL | GFP_DMA); 1318 if (!*aad_buf) 1319 goto ret_err; 1320 1321 ll = (struct ocs_dma_linked_list *)(*aad_buf); 1322 1323 *aad_descriptor = dma_map_single(aes_dev->dev, *aad_buf, 1324 *aad_desc_size, DMA_TO_DEVICE); 1325 if (dma_mapping_error(aes_dev->dev, *aad_descriptor)) { 1326 dev_err(aes_dev->dev, "DMA mapping error\n"); 1327 *aad_descriptor = 0; 1328 goto ret_err; 1329 } 1330 1331 dma_sync_single_for_cpu(aes_dev->dev, *aad_descriptor, 1332 *aad_desc_size, DMA_TO_DEVICE); 1333 1334 i = 0; 1335 while (true) { 1336 ll[i].address = sg_dma_address(sg); 1337 ll[i].byte_count = (sg_dma_len(sg) < aad_size) ? 1338 sg_dma_len(sg) : aad_size; 1339 aad_size -= ll[i].byte_count; 1340 ll[i].freeze = 0; 1341 ll[i].next = *aad_descriptor + 1342 (sizeof(struct ocs_dma_linked_list) * (i+1)); 1343 ll[i].reserved = 0; 1344 ll[i].terminate = 0; 1345 i++; 1346 if (aad_size && (i < num_aad_ents)) 1347 sg = sg_next(sg); 1348 else 1349 break; 1350 } 1351 ll[i-1].next = 0; 1352 ll[i-1].terminate = 1; 1353 data_offset = ll[i-1].byte_count; 1354 1355 dma_sync_single_for_device(aes_dev->dev, *aad_descriptor, 1356 *aad_desc_size, DMA_TO_DEVICE); 1357 } else { 1358 num_aad_ents = 0; 1359 } 1360 1361 if (data_size) { 1362 /* +1 for case where aad and data overlap in one sgl node */ 1363 num_sgl_entries = num_sgl_entries - num_aad_ents + 1; 1364 1365 *data_desc_size = sizeof(struct ocs_dma_linked_list) * 1366 num_sgl_entries; 1367 1368 /* HW requirement: descriptor must be 8 byte aligned */ 1369 *data_buf = kmalloc(*data_desc_size, GFP_KERNEL | GFP_DMA); 1370 if (!*data_buf) 1371 goto ret_err; 1372 1373 ll = (struct ocs_dma_linked_list *)(*data_buf); 1374 1375 *data_descriptor = dma_map_single(aes_dev->dev, *data_buf, 1376 *data_desc_size, DMA_TO_DEVICE); 1377 if (dma_mapping_error(aes_dev->dev, *data_descriptor)) { 1378 dev_err(aes_dev->dev, "DMA mapping error\n"); --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org