Hi Keguang, kernel test robot noticed the following build warnings: [auto build test WARNING on 62f92d634458a1e308bb699986b9147a6d670457] url: https://github.com/intel-lab-lkp/linux/commits/Keguang-Zhang-via-B4-Relay/dt-bindings-mtd-Add-Loongson-1-NAND-Controller/20240920-191936 base: 62f92d634458a1e308bb699986b9147a6d670457 patch link: https://lore.kernel.org/r/20240920-loongson1-nand-v9-2-9cc7b9345a03%40gmail.com patch subject: [PATCH v9 2/2] mtd: rawnand: Add Loongson-1 NAND Controller Driver config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20240922/202409220010.vctkHddZ-lkp@xxxxxxxxx/config) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240922/202409220010.vctkHddZ-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202409220010.vctkHddZ-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/mtd/nand/raw/loongson1_nand.c:349:17: warning: cast to smaller integer type 'u32' (aka 'unsigned int') from 'char *' [-Wpointer-to-int-cast] 349 | if (IS_ALIGNED((u32)op->buf, chip->buf_align) && | ^~~~~~~~~~~~ include/linux/align.h:13:30: note: expanded from macro 'IS_ALIGNED' 13 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) | ^ >> drivers/mtd/nand/raw/loongson1_nand.c:349:17: warning: cast to smaller integer type 'u32' (aka 'unsigned int') from 'char *' [-Wpointer-to-int-cast] 349 | if (IS_ALIGNED((u32)op->buf, chip->buf_align) && | ^~~~~~~~~~~~ include/linux/align.h:13:44: note: expanded from macro 'IS_ALIGNED' 13 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) | ^ 2 warnings generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for OMAP2PLUS_MBOX Depends on [n]: MAILBOX [=y] && (ARCH_OMAP2PLUS || ARCH_K3) Selected by [y]: - TI_K3_M4_REMOTEPROC [=y] && REMOTEPROC [=y] && (ARCH_K3 || COMPILE_TEST [=y]) vim +349 drivers/mtd/nand/raw/loongson1_nand.c 333 334 static int ls1x_nand_dma_transfer(struct ls1x_nfc *nfc, 335 struct ls1x_nfc_op *op) 336 { 337 struct nand_chip *chip = &nfc->chip; 338 struct dma_chan *chan = nfc->dma_chan; 339 struct device *dev = chan->device->dev; 340 struct dma_async_tx_descriptor *desc; 341 enum dma_data_direction data_dir = 342 op->is_write ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 343 enum dma_transfer_direction xfer_dir = 344 op->is_write ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; 345 char *dma_buf = NULL; 346 dma_addr_t dma_addr; 347 int ret; 348 > 349 if (IS_ALIGNED((u32)op->buf, chip->buf_align) && 350 IS_ALIGNED(op->len, chip->buf_align)) { 351 dma_addr = dma_map_single(dev, op->buf, op->len, data_dir); 352 if (dma_mapping_error(dev, dma_addr)) { 353 dev_err(dev, "failed to map DMA buffer\n"); 354 return -ENXIO; 355 } 356 } else if (!op->is_write) { 357 dma_buf = dma_alloc_coherent(dev, op->dma_len, &dma_addr, 358 GFP_KERNEL); 359 if (!dma_buf) 360 return -ENOMEM; 361 } else { 362 dev_err(dev, "subpage writing not supported\n"); 363 return -EOPNOTSUPP; 364 } 365 366 desc = dmaengine_prep_slave_single(chan, dma_addr, op->dma_len, 367 xfer_dir, DMA_PREP_INTERRUPT); 368 if (!desc) { 369 dev_err(dev, "failed to prepare DMA descriptor\n"); 370 ret = PTR_ERR(desc); 371 goto err; 372 } 373 desc->callback = ls1x_nand_dma_callback; 374 desc->callback_param = nfc; 375 376 nfc->dma_cookie = dmaengine_submit(desc); 377 ret = dma_submit_error(nfc->dma_cookie); 378 if (ret) { 379 dev_err(dev, "failed to submit DMA descriptor\n"); 380 goto err; 381 } 382 383 dev_dbg(dev, "issue DMA with cookie=%d\n", nfc->dma_cookie); 384 dma_async_issue_pending(chan); 385 386 ret = wait_for_completion_timeout(&nfc->dma_complete, 387 msecs_to_jiffies(2000)); 388 if (!ret) { 389 dmaengine_terminate_sync(chan); 390 reinit_completion(&nfc->dma_complete); 391 ret = -ETIMEDOUT; 392 goto err; 393 } 394 ret = 0; 395 396 if (dma_buf) 397 memcpy(op->buf, dma_buf + op->aligned_offset, op->len); 398 err: 399 if (dma_buf) 400 dma_free_coherent(dev, op->dma_len, dma_buf, dma_addr); 401 else 402 dma_unmap_single(dev, dma_addr, op->len, data_dir); 403 404 return ret; 405 } 406 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
