Hi Christophe, I love your patch! Perhaps something to improve: [auto build test WARNING on v5.17-rc6] [cannot apply to broonie-spi/for-next next-20220228] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Christophe-Leroy/Add-support-for-components-requiring-trailing-clock-after-transfer/20220228-231740 base: 7e57714cd0ad2d5bb90e50b5096a0e671dec1ef3 config: hexagon-buildonly-randconfig-r004-20220228 (https://download.01.org/0day-ci/archive/20220301/202203010254.tIHIltE2-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e) 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/0day-ci/linux/commit/7eb07c4d26401389204fcc6cf685c18c89b64ef8 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Christophe-Leroy/Add-support-for-components-requiring-trailing-clock-after-transfer/20220228-231740 git checkout 7eb07c4d26401389204fcc6cf685c18c89b64ef8 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/spi/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/spi/spi-fsl-spi.c:435:14: warning: incompatible integer to pointer conversion initializing 'const void *' with an expression of type 'unsigned long' [-Wint-conversion] .tx_buf = empty_zero_page, ^~~~~~~~~~~~~~~ 1 warning generated. vim +435 drivers/spi/spi-fsl-spi.c 356 357 static int fsl_spi_do_one_msg(struct spi_master *master, 358 struct spi_message *m) 359 { 360 struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(master); 361 struct spi_device *spi = m->spi; 362 struct spi_transfer *t, *first; 363 unsigned int cs_change; 364 const int nsecs = 50; 365 int status, last_bpw; 366 367 /* 368 * In CPU mode, optimize large byte transfers to use larger 369 * bits_per_word values to reduce number of interrupts taken. 370 */ 371 if (!(mpc8xxx_spi->flags & SPI_CPM_MODE)) { 372 list_for_each_entry(t, &m->transfers, transfer_list) { 373 if (t->len < 256 || t->bits_per_word != 8) 374 continue; 375 if ((t->len & 3) == 0) 376 t->bits_per_word = 32; 377 else if ((t->len & 1) == 0) 378 t->bits_per_word = 16; 379 } 380 } 381 382 /* Don't allow changes if CS is active */ 383 cs_change = 1; 384 list_for_each_entry(t, &m->transfers, transfer_list) { 385 if (cs_change) 386 first = t; 387 cs_change = t->cs_change; 388 if (first->speed_hz != t->speed_hz) { 389 dev_err(&spi->dev, 390 "speed_hz cannot change while CS is active\n"); 391 return -EINVAL; 392 } 393 } 394 395 last_bpw = -1; 396 cs_change = 1; 397 status = -EINVAL; 398 list_for_each_entry(t, &m->transfers, transfer_list) { 399 if (cs_change || last_bpw != t->bits_per_word) 400 status = fsl_spi_setup_transfer(spi, t); 401 if (status < 0) 402 break; 403 last_bpw = t->bits_per_word; 404 405 if (cs_change) { 406 fsl_spi_chipselect(spi, BITBANG_CS_ACTIVE); 407 ndelay(nsecs); 408 } 409 cs_change = t->cs_change; 410 if (t->len) 411 status = fsl_spi_bufs(spi, t, m->is_dma_mapped); 412 if (status) { 413 status = -EMSGSIZE; 414 break; 415 } 416 m->actual_length += t->len; 417 418 spi_transfer_delay_exec(t); 419 420 if (cs_change) { 421 ndelay(nsecs); 422 fsl_spi_chipselect(spi, BITBANG_CS_INACTIVE); 423 ndelay(nsecs); 424 } 425 } 426 427 if (status || !cs_change) { 428 ndelay(nsecs); 429 fsl_spi_chipselect(spi, BITBANG_CS_INACTIVE); 430 } 431 432 if (!status && spi->trailing_bits) { 433 struct spi_transfer t = { 434 .len = 1, > 435 .tx_buf = empty_zero_page, 436 }; 437 438 if (spi->trailing_bits < 4) 439 t.bits_per_word = 4; 440 else if (spi->trailing_bits > 8) 441 t.bits_per_word = 16; 442 else 443 t.bits_per_word = spi->trailing_bits; 444 445 status = fsl_spi_setup_transfer(spi, &t); 446 if (!status) 447 status = fsl_spi_bufs(spi, &t, 0); 448 } 449 m->status = status; 450 451 fsl_spi_setup_transfer(spi, NULL); 452 spi_finalize_current_message(master); 453 return 0; 454 } 455 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
