Hi Guoniu.zhou, FYI, the error/warning still remains. tree: https://github.com/Freescale/linux-fslc pr/462 head: d82f28fa72f28c7f24d32e0707fce12f234402bd commit: c339e95a929cb7112a10f8b7ccccc62bcae2e48a [11464/14694] MLK-25591-03: pxp: Kconfg: remove dependency of 32 bits ARM platform config: nds32-randconfig-r011-20211001 (attached as .config) compiler: nds32le-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/Freescale/linux-fslc/commit/c339e95a929cb7112a10f8b7cc... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc pr/462 git checkout c339e95a929cb7112a10f8b7ccccc62bcae2e48a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/dma/pxp/pxp_device.c: In function 'pxp_ioc_config_chan': 357 | DMA_TO_DEVICE, | ^~~~~~~~~~~~~ vim +357 drivers/dma/pxp/pxp_device.c ad85d4573b9201 Robby Cai 2019-08-15 305 ad85d4573b9201 Robby Cai 2019-08-15 306 static int pxp_ioc_config_chan(struct pxp_file *priv, unsigned long arg) ad85d4573b9201 Robby Cai 2019-08-15 307 { ad85d4573b9201 Robby Cai 2019-08-15 308 struct scatterlist *sg; ad85d4573b9201 Robby Cai 2019-08-15 309 struct pxp_tx_desc *desc; ad85d4573b9201 Robby Cai 2019-08-15 310 struct dma_async_tx_descriptor *txd; ad85d4573b9201 Robby Cai 2019-08-15 311 struct pxp_config_data *pxp_conf; ad85d4573b9201 Robby Cai 2019-08-15 312 dma_cookie_t cookie; ad85d4573b9201 Robby Cai 2019-08-15 313 int handle, chan_id; ad85d4573b9201 Robby Cai 2019-08-15 314 struct dma_chan *chan; ad85d4573b9201 Robby Cai 2019-08-15 315 struct pxp_chan_obj *obj; ad85d4573b9201 Robby Cai 2019-08-15 316 int i = 0, j = 0, k = 0, m = 0, length, ret, sg_len; ad85d4573b9201 Robby Cai 2019-08-15 317 ad85d4573b9201 Robby Cai 2019-08-15 318 pxp_conf = kzalloc(sizeof(*pxp_conf), GFP_KERNEL); ad85d4573b9201 Robby Cai 2019-08-15 319 if (!pxp_conf) ad85d4573b9201 Robby Cai 2019-08-15 320 return -ENOMEM; ad85d4573b9201 Robby Cai 2019-08-15 321 ad85d4573b9201 Robby Cai 2019-08-15 322 ret = copy_from_user(pxp_conf, ad85d4573b9201 Robby Cai 2019-08-15 323 (struct pxp_config_data *)arg, ad85d4573b9201 Robby Cai 2019-08-15 324 sizeof(struct pxp_config_data)); ad85d4573b9201 Robby Cai 2019-08-15 325 if (ret) { ad85d4573b9201 Robby Cai 2019-08-15 326 kfree(pxp_conf); ad85d4573b9201 Robby Cai 2019-08-15 327 return -EFAULT; ad85d4573b9201 Robby Cai 2019-08-15 328 } ad85d4573b9201 Robby Cai 2019-08-15 329 ad85d4573b9201 Robby Cai 2019-08-15 330 handle = pxp_conf->handle; ad85d4573b9201 Robby Cai 2019-08-15 331 obj = pxp_channel_object_lookup(priv, handle); ad85d4573b9201 Robby Cai 2019-08-15 332 if (!obj) { ad85d4573b9201 Robby Cai 2019-08-15 333 kfree(pxp_conf); ad85d4573b9201 Robby Cai 2019-08-15 334 return -EINVAL; ad85d4573b9201 Robby Cai 2019-08-15 335 } ad85d4573b9201 Robby Cai 2019-08-15 336 chan = obj->chan; ad85d4573b9201 Robby Cai 2019-08-15 337 chan_id = chan->chan_id; ad85d4573b9201 Robby Cai 2019-08-15 338 ad85d4573b9201 Robby Cai 2019-08-15 339 sg_len = 3; ad85d4573b9201 Robby Cai 2019-08-15 340 if (pxp_conf->proc_data.engine_enable & PXP_ENABLE_WFE_A) ad85d4573b9201 Robby Cai 2019-08-15 341 sg_len += 4; ad85d4573b9201 Robby Cai 2019-08-15 342 if (pxp_conf->proc_data.engine_enable & PXP_ENABLE_WFE_B) ad85d4573b9201 Robby Cai 2019-08-15 343 sg_len += 4; ad85d4573b9201 Robby Cai 2019-08-15 344 if (pxp_conf->proc_data.engine_enable & PXP_ENABLE_DITHER) ad85d4573b9201 Robby Cai 2019-08-15 345 sg_len += 4; ad85d4573b9201 Robby Cai 2019-08-15 346 ad85d4573b9201 Robby Cai 2019-08-15 347 sg = kmalloc(sizeof(*sg) * sg_len, GFP_KERNEL); ad85d4573b9201 Robby Cai 2019-08-15 348 if (!sg) { ad85d4573b9201 Robby Cai 2019-08-15 349 kfree(pxp_conf); ad85d4573b9201 Robby Cai 2019-08-15 350 return -ENOMEM; ad85d4573b9201 Robby Cai 2019-08-15 351 } ad85d4573b9201 Robby Cai 2019-08-15 352 ad85d4573b9201 Robby Cai 2019-08-15 353 sg_init_table(sg, sg_len); ad85d4573b9201 Robby Cai 2019-08-15 354 ad85d4573b9201 Robby Cai 2019-08-15 355 txd = chan->device->device_prep_slave_sg(chan, ad85d4573b9201 Robby Cai 2019-08-15 356 sg, sg_len, ad85d4573b9201 Robby Cai 2019-08-15 @357 DMA_TO_DEVICE, ad85d4573b9201 Robby Cai 2019-08-15 358 DMA_PREP_INTERRUPT, ad85d4573b9201 Robby Cai 2019-08-15 359 NULL); ad85d4573b9201 Robby Cai 2019-08-15 360 if (!txd) { ad85d4573b9201 Robby Cai 2019-08-15 361 pr_err("Error preparing a DMA transaction descriptor.\n"); ad85d4573b9201 Robby Cai 2019-08-15 362 kfree(pxp_conf); ad85d4573b9201 Robby Cai 2019-08-15 363 kfree(sg); ad85d4573b9201 Robby Cai 2019-08-15 364 return -EIO; ad85d4573b9201 Robby Cai 2019-08-15 365 } ad85d4573b9201 Robby Cai 2019-08-15 366 ad85d4573b9201 Robby Cai 2019-08-15 367 txd->callback_param = txd; ad85d4573b9201 Robby Cai 2019-08-15 368 txd->callback = pxp_dma_done; ad85d4573b9201 Robby Cai 2019-08-15 369 ad85d4573b9201 Robby Cai 2019-08-15 370 desc = to_tx_desc(txd); ad85d4573b9201 Robby Cai 2019-08-15 371 ad85d4573b9201 Robby Cai 2019-08-15 372 length = desc->len; ad85d4573b9201 Robby Cai 2019-08-15 373 for (i = 0; i < length; i++) { ad85d4573b9201 Robby Cai 2019-08-15 374 if (i == 0) { /* S0 */ ad85d4573b9201 Robby Cai 2019-08-15 375 memcpy(&desc->proc_data, ad85d4573b9201 Robby Cai 2019-08-15 376 &pxp_conf->proc_data, ad85d4573b9201 Robby Cai 2019-08-15 377 sizeof(struct pxp_proc_data)); ad85d4573b9201 Robby Cai 2019-08-15 378 memcpy(&desc->layer_param.s0_param, ad85d4573b9201 Robby Cai 2019-08-15 379 &pxp_conf->s0_param, ad85d4573b9201 Robby Cai 2019-08-15 380 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 381 desc = desc->next; ad85d4573b9201 Robby Cai 2019-08-15 382 } else if (i == 1) { /* Output */ ad85d4573b9201 Robby Cai 2019-08-15 383 memcpy(&desc->layer_param.out_param, ad85d4573b9201 Robby Cai 2019-08-15 384 &pxp_conf->out_param, ad85d4573b9201 Robby Cai 2019-08-15 385 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 386 desc = desc->next; ad85d4573b9201 Robby Cai 2019-08-15 387 } else if (i == 2) { ad85d4573b9201 Robby Cai 2019-08-15 388 /* OverLay */ ad85d4573b9201 Robby Cai 2019-08-15 389 memcpy(&desc->layer_param.ol_param, ad85d4573b9201 Robby Cai 2019-08-15 390 &pxp_conf->ol_param, ad85d4573b9201 Robby Cai 2019-08-15 391 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 392 desc = desc->next; ad85d4573b9201 Robby Cai 2019-08-15 393 } else if ((pxp_conf->proc_data.engine_enable & PXP_ENABLE_WFE_A) && (j < 4)) { ad85d4573b9201 Robby Cai 2019-08-15 394 for (j = 0; j < 4; j++) { ad85d4573b9201 Robby Cai 2019-08-15 395 if (j == 0) { ad85d4573b9201 Robby Cai 2019-08-15 396 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 397 &pxp_conf->wfe_a_fetch_param[0], ad85d4573b9201 Robby Cai 2019-08-15 398 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 399 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_WFE_A_FETCH0; ad85d4573b9201 Robby Cai 2019-08-15 400 } else if (j == 1) { ad85d4573b9201 Robby Cai 2019-08-15 401 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 402 &pxp_conf->wfe_a_fetch_param[1], ad85d4573b9201 Robby Cai 2019-08-15 403 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 404 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_WFE_A_FETCH1; ad85d4573b9201 Robby Cai 2019-08-15 405 } else if (j == 2) { ad85d4573b9201 Robby Cai 2019-08-15 406 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 407 &pxp_conf->wfe_a_store_param[0], ad85d4573b9201 Robby Cai 2019-08-15 408 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 409 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_WFE_A_STORE0; ad85d4573b9201 Robby Cai 2019-08-15 410 } else if (j == 3) { ad85d4573b9201 Robby Cai 2019-08-15 411 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 412 &pxp_conf->wfe_a_store_param[1], ad85d4573b9201 Robby Cai 2019-08-15 413 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 414 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_WFE_A_STORE1; ad85d4573b9201 Robby Cai 2019-08-15 415 } ad85d4573b9201 Robby Cai 2019-08-15 416 ad85d4573b9201 Robby Cai 2019-08-15 417 desc = desc->next; ad85d4573b9201 Robby Cai 2019-08-15 418 } ad85d4573b9201 Robby Cai 2019-08-15 419 ad85d4573b9201 Robby Cai 2019-08-15 420 i += 4; ad85d4573b9201 Robby Cai 2019-08-15 421 ad85d4573b9201 Robby Cai 2019-08-15 422 } else if ((pxp_conf->proc_data.engine_enable & PXP_ENABLE_WFE_B) && (m < 4)) { ad85d4573b9201 Robby Cai 2019-08-15 423 for (m = 0; m < 4; m++) { ad85d4573b9201 Robby Cai 2019-08-15 424 if (m == 0) { ad85d4573b9201 Robby Cai 2019-08-15 425 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 426 &pxp_conf->wfe_b_fetch_param[0], ad85d4573b9201 Robby Cai 2019-08-15 427 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 428 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_WFE_B_FETCH0; ad85d4573b9201 Robby Cai 2019-08-15 429 } else if (m == 1) { ad85d4573b9201 Robby Cai 2019-08-15 430 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 431 &pxp_conf->wfe_b_fetch_param[1], ad85d4573b9201 Robby Cai 2019-08-15 432 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 433 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_WFE_B_FETCH1; ad85d4573b9201 Robby Cai 2019-08-15 434 } else if (m == 2) { ad85d4573b9201 Robby Cai 2019-08-15 435 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 436 &pxp_conf->wfe_b_store_param[0], ad85d4573b9201 Robby Cai 2019-08-15 437 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 438 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_WFE_B_STORE0; ad85d4573b9201 Robby Cai 2019-08-15 439 } else if (m == 3) { ad85d4573b9201 Robby Cai 2019-08-15 440 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 441 &pxp_conf->wfe_b_store_param[1], ad85d4573b9201 Robby Cai 2019-08-15 442 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 443 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_WFE_B_STORE1; ad85d4573b9201 Robby Cai 2019-08-15 444 } ad85d4573b9201 Robby Cai 2019-08-15 445 ad85d4573b9201 Robby Cai 2019-08-15 446 desc = desc->next; ad85d4573b9201 Robby Cai 2019-08-15 447 } ad85d4573b9201 Robby Cai 2019-08-15 448 ad85d4573b9201 Robby Cai 2019-08-15 449 i += 4; ad85d4573b9201 Robby Cai 2019-08-15 450 ad85d4573b9201 Robby Cai 2019-08-15 451 } else if ((pxp_conf->proc_data.engine_enable & PXP_ENABLE_DITHER) && (k < 4)) { ad85d4573b9201 Robby Cai 2019-08-15 452 for (k = 0; k < 4; k++) { ad85d4573b9201 Robby Cai 2019-08-15 453 if (k == 0) { ad85d4573b9201 Robby Cai 2019-08-15 454 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 455 &pxp_conf->dither_fetch_param[0], ad85d4573b9201 Robby Cai 2019-08-15 456 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 457 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_DITHER_FETCH0; ad85d4573b9201 Robby Cai 2019-08-15 458 } else if (k == 1) { ad85d4573b9201 Robby Cai 2019-08-15 459 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 460 &pxp_conf->dither_fetch_param[1], ad85d4573b9201 Robby Cai 2019-08-15 461 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 462 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_DITHER_FETCH1; ad85d4573b9201 Robby Cai 2019-08-15 463 } else if (k == 2) { ad85d4573b9201 Robby Cai 2019-08-15 464 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 465 &pxp_conf->dither_store_param[0], ad85d4573b9201 Robby Cai 2019-08-15 466 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 467 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_DITHER_STORE0; ad85d4573b9201 Robby Cai 2019-08-15 468 } else if (k == 3) { ad85d4573b9201 Robby Cai 2019-08-15 469 memcpy(&desc->layer_param.processing_param, ad85d4573b9201 Robby Cai 2019-08-15 470 &pxp_conf->dither_store_param[1], ad85d4573b9201 Robby Cai 2019-08-15 471 sizeof(struct pxp_layer_param)); ad85d4573b9201 Robby Cai 2019-08-15 472 desc->layer_param.processing_param.flag = PXP_BUF_FLAG_DITHER_STORE1; ad85d4573b9201 Robby Cai 2019-08-15 473 } ad85d4573b9201 Robby Cai 2019-08-15 474 ad85d4573b9201 Robby Cai 2019-08-15 475 desc = desc->next; ad85d4573b9201 Robby Cai 2019-08-15 476 } ad85d4573b9201 Robby Cai 2019-08-15 477 ad85d4573b9201 Robby Cai 2019-08-15 478 i += 4; ad85d4573b9201 Robby Cai 2019-08-15 479 } ad85d4573b9201 Robby Cai 2019-08-15 480 } ad85d4573b9201 Robby Cai 2019-08-15 481 ad85d4573b9201 Robby Cai 2019-08-15 482 cookie = txd->tx_submit(txd); ad85d4573b9201 Robby Cai 2019-08-15 483 if (cookie < 0) { ad85d4573b9201 Robby Cai 2019-08-15 484 pr_err("Error tx_submit\n"); ad85d4573b9201 Robby Cai 2019-08-15 485 kfree(pxp_conf); ad85d4573b9201 Robby Cai 2019-08-15 486 kfree(sg); ad85d4573b9201 Robby Cai 2019-08-15 487 return -EIO; ad85d4573b9201 Robby Cai 2019-08-15 488 } ad85d4573b9201 Robby Cai 2019-08-15 489 ad85d4573b9201 Robby Cai 2019-08-15 490 atomic_inc(&irq_info[chan_id].irq_pending); ad85d4573b9201 Robby Cai 2019-08-15 491 ad85d4573b9201 Robby Cai 2019-08-15 492 kfree(pxp_conf); ad85d4573b9201 Robby Cai 2019-08-15 493 kfree(sg); ad85d4573b9201 Robby Cai 2019-08-15 494 ad85d4573b9201 Robby Cai 2019-08-15 495 return 0; ad85d4573b9201 Robby Cai 2019-08-15 496 } ad85d4573b9201 Robby Cai 2019-08-15 497 :::::: The code at line 357 was first introduced by commit :::::: ad85d4573b9201d18cc7d35ce05e4df8e5138b52 dma: pxp: porting pxp dma driver from imx_4.19.y :::::: TO: Robby Cai <robby.cai(a)nxp.com&gt; :::::: CC: Dong Aisheng <aisheng.dong(a)nxp.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org