tree: git://git.infradead.org/nvme.git nvme-5.8 head: 553d88b29099fdbc11a0a909995003d15a31a458 commit: af915d6c11227cc06ab23d2ab5649de066ed3dcc [30/33] nvmet: add metadata/T10-PI support config: x86_64-allyesconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-193-gb8fad4bc-dirty git checkout af915d6c11227cc06ab23d2ab5649de066ed3dcc # save the attached .config to linux build tree make C=1 ARCH=x86_64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +541 drivers/nvme/target/admin-cmd.c 472 473 static void nvmet_execute_identify_ns(struct nvmet_req *req) 474 { 475 struct nvmet_ctrl *ctrl = req->sq->ctrl; 476 struct nvmet_ns *ns; 477 struct nvme_id_ns *id; 478 u16 status = 0; 479 480 if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) { 481 req->error_loc = offsetof(struct nvme_identify, nsid); 482 status = NVME_SC_INVALID_NS | NVME_SC_DNR; 483 goto out; 484 } 485 486 id = kzalloc(sizeof(*id), GFP_KERNEL); 487 if (!id) { 488 status = NVME_SC_INTERNAL; 489 goto out; 490 } 491 492 /* return an all zeroed buffer if we can't find an active namespace */ 493 ns = nvmet_find_namespace(ctrl, req->cmd->identify.nsid); 494 if (!ns) 495 goto done; 496 497 nvmet_ns_revalidate(ns); 498 499 /* 500 * nuse = ncap = nsze isn't always true, but we have no way to find 501 * that out from the underlying device. 502 */ 503 id->ncap = id->nsze = cpu_to_le64(ns->size >> ns->blksize_shift); 504 switch (req->port->ana_state[ns->anagrpid]) { 505 case NVME_ANA_INACCESSIBLE: 506 case NVME_ANA_PERSISTENT_LOSS: 507 break; 508 default: 509 id->nuse = id->nsze; 510 break; 511 } 512 513 if (ns->bdev) 514 nvmet_bdev_set_limits(ns->bdev, id); 515 516 /* 517 * We just provide a single LBA format that matches what the 518 * underlying device reports. 519 */ 520 id->nlbaf = 0; 521 id->flbas = 0; 522 523 /* 524 * Our namespace might always be shared. Not just with other 525 * controllers, but also with any other user of the block device. 526 */ 527 id->nmic = (1 << 0); 528 id->anagrpid = cpu_to_le32(ns->anagrpid); 529 530 memcpy(&id->nguid, &ns->nguid, sizeof(id->nguid)); 531 532 id->lbaf[0].ds = ns->blksize_shift; 533 534 if (ctrl->pi_support && nvmet_ns_has_pi(ns)) { 535 id->dpc = NVME_NS_DPC_PI_FIRST | NVME_NS_DPC_PI_LAST | 536 NVME_NS_DPC_PI_TYPE1 | NVME_NS_DPC_PI_TYPE2 | 537 NVME_NS_DPC_PI_TYPE3; 538 id->mc = NVME_MC_EXTENDED_LBA; 539 id->dps = ns->pi_type; 540 id->flbas = NVME_NS_FLBAS_META_EXT; 542 } 543 544 if (ns->readonly) 545 id->nsattr |= (1 << 0); 546 nvmet_put_namespace(ns); 547 done: 548 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); 549 kfree(id); 550 out: 551 nvmet_req_complete(req, status); 552 } 553 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org