tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b74523885a715463203d4ccc3cf8c85952d3701a commit: 50b1956da3d0bd25e275aa0614d51553754bdb04 [13666/14231] Merge remote-tracking branch 'ieee1394/for-next' config: arm-randconfig-r013-20210421 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 50b1956da3d0bd25e275aa0614d51553754bdb04 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/firewire/net.c: In function 'fwnet_finish_incoming_packet': 491 | struct fwnet_device *dev; | ^~~ vim +/dev +491 drivers/firewire/net.c c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 485 5a124d382ea5c9 drivers/firewire/net.c Stefan Richter 2009-06-14 486 f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 487 static int fwnet_finish_incoming_packet(struct net_device *net, f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 488 struct sk_buff *skb, u16 source_node_id, f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 489 bool is_broadcast, u16 ether_type) f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 490 { f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 @491 struct fwnet_device *dev; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 492 int status; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 493 18406d7e42a67d drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 494 switch (ether_type) { 18406d7e42a67d drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 495 case ETH_P_ARP: 18406d7e42a67d drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 496 case ETH_P_IP: cb6bf35502d533 drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 497 #if IS_ENABLED(CONFIG_IPV6) cb6bf35502d533 drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 498 case ETH_P_IPV6: cb6bf35502d533 drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 499 #endif 18406d7e42a67d drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 500 break; 18406d7e42a67d drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 501 default: 18406d7e42a67d drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 502 goto err; 18406d7e42a67d drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 503 } 18406d7e42a67d drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 504 f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 505 dev = netdev_priv(net); c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 506 /* Write metadata, and then pass to the receive level */ f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 507 skb->dev = net; b577d7e2ad50cf drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-01-19 508 skb->ip_summed = CHECKSUM_NONE; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 509 c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 510 /* c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 511 * Parse the encapsulation header. This actually does the job of 6752c8db8e0cfe drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 512 * converting to an ethernet-like pseudo frame header. c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 513 */ f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 514 if (dev_hard_header(skb, net, ether_type, 6752c8db8e0cfe drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 515 is_broadcast ? net->broadcast : net->dev_addr, f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 516 NULL, skb->len) >= 0) { f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 517 struct fwnet_header *eth; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 518 u16 *rawp; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 519 __be16 protocol; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 520 c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 521 skb_reset_mac_header(skb); c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 522 skb_pull(skb, sizeof(*eth)); f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 523 eth = (struct fwnet_header *)skb_mac_header(skb); 021b97e469714b drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 524 if (fwnet_hwaddr_is_multicast(eth->h_dest)) { f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 525 if (memcmp(eth->h_dest, net->broadcast, f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 526 net->addr_len) == 0) c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 527 skb->pkt_type = PACKET_BROADCAST; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 528 #if 0 c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 529 else c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 530 skb->pkt_type = PACKET_MULTICAST; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 531 #endif c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 532 } else { 156ce867a6725e drivers/firewire/net.c Stefan Richter 2009-06-14 533 if (memcmp(eth->h_dest, net->dev_addr, net->addr_len)) c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 534 skb->pkt_type = PACKET_OTHERHOST; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 535 } e5c5d22e8dcf7c drivers/firewire/net.c Simon Horman 2013-03-28 536 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) { c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 537 protocol = eth->h_proto; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 538 } else { c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 539 rawp = (u16 *)skb->data; f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 540 if (*rawp == 0xffff) c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 541 protocol = htons(ETH_P_802_3); f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 542 else c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 543 protocol = htons(ETH_P_802_2); c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 544 } c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 545 skb->protocol = protocol; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 546 } c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 547 status = netif_rx(skb); c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 548 if (status == NET_RX_DROP) { f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 549 net->stats.rx_errors++; f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 550 net->stats.rx_dropped++; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 551 } else { f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 552 net->stats.rx_packets++; f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 553 net->stats.rx_bytes += skb->len; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 554 } f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 555 c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 556 return 0; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 557 18406d7e42a67d drivers/firewire/net.c YOSHIFUJI Hideaki / 吉藤英明 2013-03-25 558 err: f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 559 net->stats.rx_errors++; f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 560 net->stats.rx_dropped++; f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 561 c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 562 dev_kfree_skb_any(skb); f91e3bd842ec6f drivers/firewire/net.c Stefan Richter 2009-06-07 563 1bf145fed57258 drivers/firewire/net.c Stefan Richter 2010-08-16 564 return -ENOENT; c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 565 } c76acec6d55107 drivers/firewire/fw-ipv4.c Jay Fenlason 2009-05-18 566 :::::: The code at line 491 was first introduced by commit :::::: f91e3bd842ec6f5cea245993926ee8ff26250467 firewire: net: style changes :::::: TO: Stefan Richter <stefanr(a)s5r6.in-berlin.de&gt; :::::: CC: Stefan Richter <stefanr(a)s5r6.in-berlin.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org