* drivers/nfc/microread/microread.c:489:26: sparse: sparse: cast to restricted __be16
@ 2026-09-18 0:07 kernel test robot
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From: kernel test robot @ 2026-09-18 0:07 UTC (permalink / raw)
To: Simon Richter; +Cc: oe-kbuild-all, linux-kernel
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 9b87fdc9af2fbfcdb5c24a64139685ef80f6573f
commit: 25f9b0d351552f63ac3f72e6c655bc8f9994f7d2 misc/mei: Allow building Intel ME interface on non-x86
date: 8 months ago
config: powerpc-randconfig-r1308-20260917 (https://download.01.org/0day-ci/archive/20260918/202609180724.WqXUgoWn-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 148ee2b266b73a49f1f31d0bd17d4818b91bee9f)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260918/202609180724.WqXUgoWn-lkp@intel.com/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
| Fixes: 25f9b0d35155 ("misc/mei: Allow building Intel ME interface on non-x86")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609180724.WqXUgoWn-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> drivers/nfc/microread/microread.c:489:26: sparse: sparse: cast to restricted __be16
drivers/nfc/microread/microread.c:503:26: sparse: sparse: cast to restricted __be16
drivers/nfc/microread/microread.c:521:25: sparse: sparse: cast to restricted __le16
vim +489 drivers/nfc/microread/microread.c
cfad1ba87150e19 Eric Lapuyade 2012-12-18 467
cfad1ba87150e19 Eric Lapuyade 2012-12-18 468 static void microread_target_discovered(struct nfc_hci_dev *hdev, u8 gate,
cfad1ba87150e19 Eric Lapuyade 2012-12-18 469 struct sk_buff *skb)
cfad1ba87150e19 Eric Lapuyade 2012-12-18 470 {
cfad1ba87150e19 Eric Lapuyade 2012-12-18 471 struct nfc_target *targets;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 472 int r = 0;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 473
cfad1ba87150e19 Eric Lapuyade 2012-12-18 474 pr_info("target discovered to gate 0x%x\n", gate);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 475
cfad1ba87150e19 Eric Lapuyade 2012-12-18 476 targets = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 477 if (targets == NULL) {
cfad1ba87150e19 Eric Lapuyade 2012-12-18 478 r = -ENOMEM;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 479 goto exit;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 480 }
cfad1ba87150e19 Eric Lapuyade 2012-12-18 481
cfad1ba87150e19 Eric Lapuyade 2012-12-18 482 targets->hci_reader_gate = gate;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 483
cfad1ba87150e19 Eric Lapuyade 2012-12-18 484 switch (gate) {
cfad1ba87150e19 Eric Lapuyade 2012-12-18 485 case MICROREAD_GATE_ID_MREAD_ISO_A:
cfad1ba87150e19 Eric Lapuyade 2012-12-18 486 targets->supported_protocols =
cfad1ba87150e19 Eric Lapuyade 2012-12-18 487 nfc_hci_sak_to_protocol(skb->data[MICROREAD_EMCF_A_SAK]);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 488 targets->sens_res =
cfad1ba87150e19 Eric Lapuyade 2012-12-18 @489 be16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_A_ATQA]);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 490 targets->sel_res = skb->data[MICROREAD_EMCF_A_SAK];
cfad1ba87150e19 Eric Lapuyade 2012-12-18 491 targets->nfcid1_len = skb->data[MICROREAD_EMCF_A_LEN];
d07f1e8600ccb88 Dan Carpenter 2014-09-01 492 if (targets->nfcid1_len > sizeof(targets->nfcid1)) {
d07f1e8600ccb88 Dan Carpenter 2014-09-01 493 r = -EINVAL;
d07f1e8600ccb88 Dan Carpenter 2014-09-01 494 goto exit_free;
d07f1e8600ccb88 Dan Carpenter 2014-09-01 495 }
d07f1e8600ccb88 Dan Carpenter 2014-09-01 496 memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_A_UID],
d07f1e8600ccb88 Dan Carpenter 2014-09-01 497 targets->nfcid1_len);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 498 break;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 499 case MICROREAD_GATE_ID_MREAD_ISO_A_3:
cfad1ba87150e19 Eric Lapuyade 2012-12-18 500 targets->supported_protocols =
cfad1ba87150e19 Eric Lapuyade 2012-12-18 501 nfc_hci_sak_to_protocol(skb->data[MICROREAD_EMCF_A3_SAK]);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 502 targets->sens_res =
cfad1ba87150e19 Eric Lapuyade 2012-12-18 503 be16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_A3_ATQA]);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 504 targets->sel_res = skb->data[MICROREAD_EMCF_A3_SAK];
cfad1ba87150e19 Eric Lapuyade 2012-12-18 505 targets->nfcid1_len = skb->data[MICROREAD_EMCF_A3_LEN];
d07f1e8600ccb88 Dan Carpenter 2014-09-01 506 if (targets->nfcid1_len > sizeof(targets->nfcid1)) {
d07f1e8600ccb88 Dan Carpenter 2014-09-01 507 r = -EINVAL;
d07f1e8600ccb88 Dan Carpenter 2014-09-01 508 goto exit_free;
d07f1e8600ccb88 Dan Carpenter 2014-09-01 509 }
d07f1e8600ccb88 Dan Carpenter 2014-09-01 510 memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_A3_UID],
d07f1e8600ccb88 Dan Carpenter 2014-09-01 511 targets->nfcid1_len);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 512 break;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 513 case MICROREAD_GATE_ID_MREAD_ISO_B:
cfad1ba87150e19 Eric Lapuyade 2012-12-18 514 targets->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 515 memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_B_UID], 4);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 516 targets->nfcid1_len = 4;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 517 break;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 518 case MICROREAD_GATE_ID_MREAD_NFC_T1:
cfad1ba87150e19 Eric Lapuyade 2012-12-18 519 targets->supported_protocols = NFC_PROTO_JEWEL_MASK;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 520 targets->sens_res =
cfad1ba87150e19 Eric Lapuyade 2012-12-18 521 le16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_T1_ATQA]);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 522 memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_T1_UID], 4);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 523 targets->nfcid1_len = 4;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 524 break;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 525 case MICROREAD_GATE_ID_MREAD_NFC_T3:
cfad1ba87150e19 Eric Lapuyade 2012-12-18 526 targets->supported_protocols = NFC_PROTO_FELICA_MASK;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 527 memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_T3_UID], 8);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 528 targets->nfcid1_len = 8;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 529 break;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 530 default:
cfad1ba87150e19 Eric Lapuyade 2012-12-18 531 pr_info("discard target discovered to gate 0x%x\n", gate);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 532 goto exit_free;
cfad1ba87150e19 Eric Lapuyade 2012-12-18 533 }
cfad1ba87150e19 Eric Lapuyade 2012-12-18 534
cfad1ba87150e19 Eric Lapuyade 2012-12-18 535 r = nfc_targets_found(hdev->ndev, targets, 1);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 536
cfad1ba87150e19 Eric Lapuyade 2012-12-18 537 exit_free:
cfad1ba87150e19 Eric Lapuyade 2012-12-18 538 kfree(targets);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 539
cfad1ba87150e19 Eric Lapuyade 2012-12-18 540 exit:
cfad1ba87150e19 Eric Lapuyade 2012-12-18 541 kfree_skb(skb);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 542
cfad1ba87150e19 Eric Lapuyade 2012-12-18 543 if (r)
17936b43f0fdede Joe Perches 2013-04-05 544 pr_err("Failed to handle discovered target err=%d\n", r);
cfad1ba87150e19 Eric Lapuyade 2012-12-18 545 }
cfad1ba87150e19 Eric Lapuyade 2012-12-18 546
:::::: The code at line 489 was first introduced by commit
:::::: cfad1ba87150e198be9ea32367a24e500e59de2c NFC: Initial support for Inside Secure microread
:::::: TO: Eric Lapuyade <eric.lapuyade@linux.intel.com>
:::::: CC: Samuel Ortiz <sameo@linux.intel.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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