Hi Chunfeng, I love your patch! Perhaps something to improve: [auto build test WARNING on balbi-usb/testing/next] [also build test WARNING on v5.11-rc3 next-20210112] [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/Chunfeng-Yun/usb-gadget-bdc-fix-improper-SPDX-comment-style-for-header-file/20210113-105252 base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next config: x86_64-randconfig-s022-20210113 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-208-g46a52ca4-dirty # https://github.com/0day-ci/linux/commit/b9301494d83b247a1c4c1ecc892a9f806dde0aaf git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Chunfeng-Yun/usb-gadget-bdc-fix-improper-SPDX-comment-style-for-header-file/20210113-105252 git checkout b9301494d83b247a1c4c1ecc892a9f806dde0aaf # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> "sparse warnings: (new ones prefixed by >>)" >> drivers/usb/gadget/udc/bdc/bdc_ep.c:498:26: sparse: sparse: cast truncates bits from constant value (ffffffff7fffffff becomes 7fffffff) vim +498 drivers/usb/gadget/udc/bdc/bdc_ep.c efed421a94e62a7d Ashwini Pahuja 2014-11-13 423 efed421a94e62a7d Ashwini Pahuja 2014-11-13 424 /* Setup the bd dma descriptor for a given request */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 425 static int setup_bd_list_xfr(struct bdc *bdc, struct bdc_req *req, int num_bds) efed421a94e62a7d Ashwini Pahuja 2014-11-13 426 { efed421a94e62a7d Ashwini Pahuja 2014-11-13 427 dma_addr_t buf_add = req->usb_req.dma; efed421a94e62a7d Ashwini Pahuja 2014-11-13 428 u32 maxp, tfs, dword2, dword3; efed421a94e62a7d Ashwini Pahuja 2014-11-13 429 struct bd_transfer *bd_xfr; efed421a94e62a7d Ashwini Pahuja 2014-11-13 430 struct bd_list *bd_list; efed421a94e62a7d Ashwini Pahuja 2014-11-13 431 struct bdc_ep *ep; efed421a94e62a7d Ashwini Pahuja 2014-11-13 432 struct bdc_bd *bd; efed421a94e62a7d Ashwini Pahuja 2014-11-13 433 int ret, bdnum; efed421a94e62a7d Ashwini Pahuja 2014-11-13 434 u32 req_len; efed421a94e62a7d Ashwini Pahuja 2014-11-13 435 efed421a94e62a7d Ashwini Pahuja 2014-11-13 436 ep = req->ep; efed421a94e62a7d Ashwini Pahuja 2014-11-13 437 bd_list = &ep->bd_list; efed421a94e62a7d Ashwini Pahuja 2014-11-13 438 bd_xfr = &req->bd_xfr; efed421a94e62a7d Ashwini Pahuja 2014-11-13 439 bd_xfr->req = req; efed421a94e62a7d Ashwini Pahuja 2014-11-13 440 bd_xfr->start_bdi = bd_list->eqp_bdi; efed421a94e62a7d Ashwini Pahuja 2014-11-13 441 bd = bdi_to_bd(ep, bd_list->eqp_bdi); efed421a94e62a7d Ashwini Pahuja 2014-11-13 442 req_len = req->usb_req.length; cc2e895c604c480b Felipe Balbi 2016-09-28 443 maxp = usb_endpoint_maxp(ep->desc); efed421a94e62a7d Ashwini Pahuja 2014-11-13 444 tfs = roundup(req->usb_req.length, maxp); efed421a94e62a7d Ashwini Pahuja 2014-11-13 445 tfs = tfs/maxp; efed421a94e62a7d Ashwini Pahuja 2014-11-13 446 dev_vdbg(bdc->dev, "%s ep:%s num_bds:%d tfs:%d r_len:%d bd:%p\n", efed421a94e62a7d Ashwini Pahuja 2014-11-13 447 __func__, ep->name, num_bds, tfs, req_len, bd); efed421a94e62a7d Ashwini Pahuja 2014-11-13 448 efed421a94e62a7d Ashwini Pahuja 2014-11-13 449 for (bdnum = 0; bdnum < num_bds; bdnum++) { efed421a94e62a7d Ashwini Pahuja 2014-11-13 450 dword2 = dword3 = 0; efed421a94e62a7d Ashwini Pahuja 2014-11-13 451 /* First bd */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 452 if (!bdnum) { efed421a94e62a7d Ashwini Pahuja 2014-11-13 453 dword3 |= BD_SOT|BD_SBF|(tfs<<BD_TFS_SHIFT); efed421a94e62a7d Ashwini Pahuja 2014-11-13 454 dword2 |= BD_LTF; efed421a94e62a7d Ashwini Pahuja 2014-11-13 455 /* format of first bd for ep0 is different than other */ 016040268ccafaa7 Dan Carpenter 2014-11-29 456 if (ep->ep_num == 1) { efed421a94e62a7d Ashwini Pahuja 2014-11-13 457 ret = setup_first_bd_ep0(bdc, req, &dword3); efed421a94e62a7d Ashwini Pahuja 2014-11-13 458 if (ret) efed421a94e62a7d Ashwini Pahuja 2014-11-13 459 return ret; efed421a94e62a7d Ashwini Pahuja 2014-11-13 460 } 016040268ccafaa7 Dan Carpenter 2014-11-29 461 } efed421a94e62a7d Ashwini Pahuja 2014-11-13 462 if (!req->ep->dir) efed421a94e62a7d Ashwini Pahuja 2014-11-13 463 dword3 |= BD_ISP; efed421a94e62a7d Ashwini Pahuja 2014-11-13 464 efed421a94e62a7d Ashwini Pahuja 2014-11-13 465 if (req_len > BD_MAX_BUFF_SIZE) { efed421a94e62a7d Ashwini Pahuja 2014-11-13 466 dword2 |= BD_MAX_BUFF_SIZE; efed421a94e62a7d Ashwini Pahuja 2014-11-13 467 req_len -= BD_MAX_BUFF_SIZE; efed421a94e62a7d Ashwini Pahuja 2014-11-13 468 } else { efed421a94e62a7d Ashwini Pahuja 2014-11-13 469 /* this should be the last bd */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 470 dword2 |= req_len; efed421a94e62a7d Ashwini Pahuja 2014-11-13 471 dword3 |= BD_IOC; efed421a94e62a7d Ashwini Pahuja 2014-11-13 472 dword3 |= BD_EOT; efed421a94e62a7d Ashwini Pahuja 2014-11-13 473 } efed421a94e62a7d Ashwini Pahuja 2014-11-13 474 /* Currently only 1 INT target is supported */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 475 dword2 |= BD_INTR_TARGET(0); efed421a94e62a7d Ashwini Pahuja 2014-11-13 476 bd = bdi_to_bd(ep, ep->bd_list.eqp_bdi); efed421a94e62a7d Ashwini Pahuja 2014-11-13 477 if (unlikely(!bd)) { efed421a94e62a7d Ashwini Pahuja 2014-11-13 478 dev_err(bdc->dev, "Err bd pointing to wrong addr\n"); efed421a94e62a7d Ashwini Pahuja 2014-11-13 479 return -EINVAL; efed421a94e62a7d Ashwini Pahuja 2014-11-13 480 } efed421a94e62a7d Ashwini Pahuja 2014-11-13 481 /* write bd */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 482 bd->offset[0] = cpu_to_le32(lower_32_bits(buf_add)); efed421a94e62a7d Ashwini Pahuja 2014-11-13 483 bd->offset[1] = cpu_to_le32(upper_32_bits(buf_add)); efed421a94e62a7d Ashwini Pahuja 2014-11-13 484 bd->offset[2] = cpu_to_le32(dword2); efed421a94e62a7d Ashwini Pahuja 2014-11-13 485 bd->offset[3] = cpu_to_le32(dword3); efed421a94e62a7d Ashwini Pahuja 2014-11-13 486 /* advance eqp pointer */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 487 ep_bdlist_eqp_adv(ep); efed421a94e62a7d Ashwini Pahuja 2014-11-13 488 /* advance the buff pointer */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 489 buf_add += BD_MAX_BUFF_SIZE; efed421a94e62a7d Ashwini Pahuja 2014-11-13 490 dev_vdbg(bdc->dev, "buf_add:%08llx req_len:%d bd:%p eqp:%d\n", efed421a94e62a7d Ashwini Pahuja 2014-11-13 491 (unsigned long long)buf_add, req_len, bd, efed421a94e62a7d Ashwini Pahuja 2014-11-13 492 ep->bd_list.eqp_bdi); efed421a94e62a7d Ashwini Pahuja 2014-11-13 493 bd = bdi_to_bd(ep, ep->bd_list.eqp_bdi); efed421a94e62a7d Ashwini Pahuja 2014-11-13 494 bd->offset[3] = cpu_to_le32(BD_SBF); efed421a94e62a7d Ashwini Pahuja 2014-11-13 495 } efed421a94e62a7d Ashwini Pahuja 2014-11-13 496 /* clear the STOP BD fetch bit from the first bd of this xfr */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 497 bd = bdi_to_bd(ep, bd_xfr->start_bdi); efed421a94e62a7d Ashwini Pahuja 2014-11-13 @498 bd->offset[3] &= cpu_to_le32(~BD_SBF); efed421a94e62a7d Ashwini Pahuja 2014-11-13 499 /* the new eqp will be next hw dqp */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 500 bd_xfr->num_bds = num_bds; efed421a94e62a7d Ashwini Pahuja 2014-11-13 501 bd_xfr->next_hwd_bdi = ep->bd_list.eqp_bdi; efed421a94e62a7d Ashwini Pahuja 2014-11-13 502 /* everything is written correctly before notifying the HW */ efed421a94e62a7d Ashwini Pahuja 2014-11-13 503 wmb(); efed421a94e62a7d Ashwini Pahuja 2014-11-13 504 efed421a94e62a7d Ashwini Pahuja 2014-11-13 505 return 0; efed421a94e62a7d Ashwini Pahuja 2014-11-13 506 } efed421a94e62a7d Ashwini Pahuja 2014-11-13 507 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Attachment:
.config.gz
Description: application/gzip
