tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 65f0d2414b7079556fbbcc070b3d1c9f9587606d commit: dc1a9bf2c8169d9f607502162af1858a73a18cb8 octeontx2-pf: Add UDP segmentation offload support date: 4 months ago config: alpha-randconfig-s032-20210113 (attached as .config) compiler: alpha-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-208-g46a52ca4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout dc1a9bf2c8169d9f607502162af1858a73a18cb8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=alpha If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c:544:31: sparse: expected unsigned short [usertype] iplen drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c:544:31: sparse: got restricted __be16 [usertype] drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c:546:54: sparse: expected restricted __be16 [usertype] tot_len drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c:546:54: sparse: got unsigned short [usertype] iplen drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c:549:60: sparse: expected restricted __be16 [usertype] payload_len drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c:549:60: sparse: got unsigned short [usertype] iplen vim +544 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c 503 504 /* Add SQE extended header subdescriptor */ 505 static void otx2_sqe_add_ext(struct otx2_nic *pfvf, struct otx2_snd_queue *sq, 506 struct sk_buff *skb, int *offset) 507 { 508 struct nix_sqe_ext_s *ext; 509 510 ext = (struct nix_sqe_ext_s *)(sq->sqe_base + *offset); 511 ext->subdc = NIX_SUBDC_EXT; 512 if (skb_shinfo(skb)->gso_size) { 513 ext->lso = 1; 514 ext->lso_sb = skb_transport_offset(skb) + tcp_hdrlen(skb); 515 ext->lso_mps = skb_shinfo(skb)->gso_size; 516 517 /* Only TSOv4 and TSOv6 GSO offloads are supported */ 518 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) { 519 ext->lso_format = pfvf->hw.lso_tsov4_idx; 520 521 /* HW adds payload size to 'ip_hdr->tot_len' while 522 * sending TSO segment, hence set payload length 523 * in IP header of the packet to just header length. 524 */ 525 ip_hdr(skb)->tot_len = 526 htons(ext->lso_sb - skb_network_offset(skb)); 527 } else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) { 528 ext->lso_format = pfvf->hw.lso_tsov6_idx; 529 530 ipv6_hdr(skb)->payload_len = 531 htons(ext->lso_sb - skb_network_offset(skb)); 532 } else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { 533 __be16 l3_proto = vlan_get_protocol(skb); 534 struct udphdr *udph = udp_hdr(skb); 535 u16 iplen; 536 537 ext->lso_sb = skb_transport_offset(skb) + 538 sizeof(struct udphdr); 539 540 /* HW adds payload size to length fields in IP and 541 * UDP headers while segmentation, hence adjust the 542 * lengths to just header sizes. 543 */ 545 if (l3_proto == htons(ETH_P_IP)) { 547 ext->lso_format = pfvf->hw.lso_udpv4_idx; 548 } else { 550 ext->lso_format = pfvf->hw.lso_udpv6_idx; 551 } 552 553 udph->len = htons(sizeof(struct udphdr)); 554 } 555 } else if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { 556 ext->tstmp = 1; 557 } 558 559 *offset += sizeof(*ext); 560 } 561 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org