I have a P6T DELUXE V2 motherboard and using the sky2 driver for the ethernet ports. I get the following error message: [ 433.727397] eth0: hw csum failure [ 433.727406] CPU: 4 PID: 0 Comm: swapper/4 Not tainted 4.19.0-rc7 #19 [ 433.727406] Hardware name: System manufacturer System Product Name/P6T DELUXE V2, BIOS 1202 12/22/2010 [ 433.727407] Call Trace: [ 433.727409] <IRQ> [ 433.727415] dump_stack+0x46/0x5b [ 433.727419] __skb_checksum_complete+0xb0/0xc0 [ 433.727423] tcp_v4_rcv+0x528/0xb60 [ 433.727426] ? ipt_do_table+0x2d0/0x400 [ 433.727429] ip_local_deliver_finish+0x5a/0x110 [ 433.727430] ip_local_deliver+0xe1/0xf0 [ 433.727431] ? ip_sublist_rcv_finish+0x60/0x60 [ 433.727432] ip_rcv+0xca/0xe0 [ 433.727434] ? ip_rcv_finish_core.isra.0+0x300/0x300 [ 433.727436] __netif_receive_skb_one_core+0x4b/0x70 [ 433.727438] netif_receive_skb_internal+0x4e/0x130 [ 433.727439] napi_gro_receive+0x6a/0x80 [ 433.727442] sky2_poll+0x707/0xd20 [ 433.727446] ? rcu_check_callbacks+0x1b4/0x900 [ 433.727447] net_rx_action+0x237/0x380 [ 433.727449] __do_softirq+0xdc/0x1e0 [ 433.727452] irq_exit+0xa9/0xb0 [ 433.727453] do_IRQ+0x45/0xc0 [ 433.727455] common_interrupt+0xf/0xf [ 433.727456] </IRQ> [ 433.727459] RIP: 0010:cpuidle_enter_state+0x124/0x200 [ 433.727461] Code: 53 60 89 c3 e8 dd 90 ad ff 65 8b 3d 96 58 a7 7e e8 d1 8f ad ff 31 ff 49 89 c4 e8 27 99 ad ff fb 48 ba cf f7 53 e3 a5 9b c4 20 <4c> 89 e1 4c 29 e9 48 89 c8 48 c1 f9 3f 48 f7 ea b8 ff ff ff 7f 48 [ 433.727462] RSP: 0000:ffffc900000a3e98 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffde [ 433.727463] RAX: ffff880237b1f280 RBX: 0000000000000004 RCX: 000000000000001f [ 433.727464] RDX: 20c49ba5e353f7cf RSI: 000000002fe419c1 RDI: 0000000000000000 [ 433.727465] RBP: ffff880237b263a0 R08: 0000000000000714 R09: 000000650512105d [ 433.727465] R10: 00000000ffffffff R11: 0000000000000342 R12: 00000064fc2a8b1c [ 433.727466] R13: 00000064fc25b35f R14: 0000000000000004 R15: ffffffff8204af20 [ 433.727468] ? cpuidle_enter_state+0x119/0x200 [ 433.727471] do_idle+0x1bf/0x200 [ 433.727473] cpu_startup_entry+0x6a/0x70 [ 433.727475] start_secondary+0x17f/0x1c0 [ 433.727476] secondary_startup_64+0xa4/0xb0 [ 441.662954] eth0: hw csum failure [ 441.662959] CPU: 4 PID: 4347 Comm: radeon_cs:0 Not tainted 4.19.0-rc7 #19 [ 441.662960] Hardware name: System manufacturer System Product Name/P6T DELUXE V2, BIOS 1202 12/22/2010 [ 441.662960] Call Trace: [ 441.662963] <IRQ> [ 441.662968] dump_stack+0x46/0x5b [ 441.662972] __skb_checksum_complete+0xb0/0xc0 [ 441.662975] tcp_v4_rcv+0x528/0xb60 [ 441.662979] ? ipt_do_table+0x2d0/0x400 [ 441.662981] ip_local_deliver_finish+0x5a/0x110 [ 441.662983] ip_local_deliver+0xe1/0xf0 [ 441.662985] ? ip_sublist_rcv_finish+0x60/0x60 [ 441.662986] ip_rcv+0xca/0xe0 [ 441.662988] ? ip_rcv_finish_core.isra.0+0x300/0x300 [ 441.662990] __netif_receive_skb_one_core+0x4b/0x70 [ 441.662993] netif_receive_skb_internal+0x4e/0x130 [ 441.662994] napi_gro_receive+0x6a/0x80 [ 441.662998] sky2_poll+0x707/0xd20 [ 441.663000] net_rx_action+0x237/0x380 [ 441.663002] __do_softirq+0xdc/0x1e0 [ 441.663005] irq_exit+0xa9/0xb0 [ 441.663007] do_IRQ+0x45/0xc0 [ 441.663009] common_interrupt+0xf/0xf [ 441.663010] </IRQ> [ 441.663012] RIP: 0010:merge+0x22/0xb0 [ 441.663014] Code: c3 31 c0 c3 90 90 90 90 41 56 41 55 41 54 55 48 89 d5 53 48 89 cb 48 83 ec 18 65 48 8b 04 25 28 00 00 00 48 89 44 24 10 31 c0 <48> 85 c9 74 70 48 85 d2 74 6b 49 89 fd 49 89 f6 49 89 e4 eb 14 48 [ 441.663015] RSP: 0018:ffffc9000090b988 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffde [ 441.663017] RAX: 0000000000000000 RBX: ffff88021ab2d408 RCX: ffff88021ab2d408 [ 441.663018] RDX: ffff88021ab2d388 RSI: ffffffffa021c440 RDI: 0000000000000000 [ 441.663019] RBP: ffff88021ab2d388 R08: 0000000000005ecf R09: 0000000000008500 [ 441.663020] R10: ffffea000877ec00 R11: ffff880236803500 R12: ffffffffa021c440 [ 441.663021] R13: ffff88021ab2d448 R14: 0000000000000004 R15: ffffc9000090b9e0 [ 441.663048] ? radeon_irq_kms_set_irq_n_enabled+0x120/0x120 [radeon] [ 441.663063] ? radeon_irq_kms_set_irq_n_enabled+0x120/0x120 [radeon] [ 441.663065] ? merge+0x57/0xb0 [ 441.663080] ? radeon_irq_kms_set_irq_n_enabled+0x120/0x120 [radeon] [ 441.663082] list_sort+0x8b/0x230 [ 441.663094] radeon_cs_parser_fini+0xdf/0x110 [radeon] [ 441.663110] radeon_cs_ioctl+0x2a4/0x710 [radeon] [ 441.663113] ? __switch_to_asm+0x34/0x70 [ 441.663114] ? __switch_to_asm+0x40/0x70 [ 441.663130] ? radeon_cs_parser_init+0x20/0x20 [radeon] [ 441.663141] drm_ioctl_kernel+0xa3/0xe0 [drm] [ 441.663149] drm_ioctl+0x2e2/0x380 [drm] [ 441.663164] ? radeon_cs_parser_init+0x20/0x20 [radeon] [ 441.663168] ? page_add_new_anon_rmap+0x42/0x70 [ 441.663171] do_vfs_ioctl+0x9a/0x600 [ 441.663173] ksys_ioctl+0x35/0x60 [ 441.663175] __x64_sys_ioctl+0x11/0x20 [ 441.663177] do_syscall_64+0x3d/0xf0 [ 441.663179] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 441.663180] RIP: 0033:0x7f9377377f37 [ 441.663182] Code: 00 00 00 75 0c 48 c7 c0 ff ff ff ff 48 83 c4 18 c3 e8 ad db 01 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 21 4f 2c 00 f7 d8 64 89 01 48 [ 441.663183] RSP: 002b:00007f92c3130d28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 441.663185] RAX: ffffffffffffffda RBX: 0000564498327ec0 RCX: 00007f9377377f37 [ 441.663186] RDX: 0000564498337ec8 RSI: 00000000c0206466 RDI: 0000000000000010 [ 441.663186] RBP: 0000564498337ec8 R08: 0000000000000000 R09: 0000000000000000 [ 441.663187] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000c0206466 [ 441.663188] R13: 0000000000000010 R14: 0000000000000000 R15: 0000564497a38120 [ 462.833418] eth0: hw csum failure [ 462.833428] CPU: 4 PID: 0 Comm: swapper/4 Not tainted 4.19.0-rc7 #19 [ 462.833429] Hardware name: System manufacturer System Product Name/P6T DELUXE V2, BIOS 1202 12/22/2010 [ 462.833429] Call Trace: [ 462.833432] <IRQ> [ 462.833438] dump_stack+0x46/0x5b [ 462.833442] __skb_checksum_complete+0xb0/0xc0 [ 462.833446] tcp_v4_rcv+0x528/0xb60 [ 462.833449] ? ipt_do_table+0x2d0/0x400 [ 462.833452] ip_local_deliver_finish+0x5a/0x110 [ 462.833454] ip_local_deliver+0xe1/0xf0 [ 462.833455] ? ip_sublist_rcv_finish+0x60/0x60 [ 462.833457] ip_rcv+0xca/0xe0 [ 462.833459] ? ip_rcv_finish_core.isra.0+0x300/0x300 [ 462.833461] __netif_receive_skb_one_core+0x4b/0x70 [ 462.833464] netif_receive_skb_internal+0x4e/0x130 [ 462.833466] napi_gro_receive+0x6a/0x80 [ 462.833469] sky2_poll+0x707/0xd20 [ 462.833471] net_rx_action+0x237/0x380 [ 462.833474] __do_softirq+0xdc/0x1e0 [ 462.833477] irq_exit+0xa9/0xb0 [ 462.833479] do_IRQ+0x45/0xc0 [ 462.833481] common_interrupt+0xf/0xf [ 462.833482] </IRQ> [ 462.833486] RIP: 0010:cpuidle_enter_state+0x124/0x200 [ 462.833488] Code: 53 60 89 c3 e8 dd 90 ad ff 65 8b 3d 96 58 a7 7e e8 d1 8f ad ff 31 ff 49 89 c4 e8 27 99 ad ff fb 48 ba cf f7 53 e3 a5 9b c4 20 <4c> 89 e1 4c 29 e9 48 89 c8 48 c1 f9 3f 48 f7 ea b8 ff ff ff 7f 48 [ 462.833489] RSP: 0018:ffffc900000a3e98 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffde [ 462.833491] RAX: ffff880237b1f280 RBX: 0000000000000004 RCX: 000000000000001f [ 462.833492] RDX: 20c49ba5e353f7cf RSI: 000000002fe419c1 RDI: 0000000000000000 [ 462.833493] RBP: ffff880237b263a0 R08: 0000000000000000 R09: 0000000000000000 [ 462.833494] R10: 00000000ffffffff R11: 0000000000000273 R12: 0000006bc3052131 [ 462.833495] R13: 0000006bc2f99f57 R14: 0000000000000004 R15: ffffffff8204af20 [ 462.833498] ? cpuidle_enter_state+0x119/0x200 [ 462.833503] do_idle+0x1bf/0x200 [ 462.833506] cpu_startup_entry+0x6a/0x70 [ 462.833510] start_secondary+0x17f/0x1c0 [ 462.833513] secondary_startup_64+0xa4/0xb0 Something is changed between 4.17.12 and 4.18, after bisecting the problem I got the following first bad commit: commit 88078d98d1bb085d72af8437707279e203524fa5 Author: Eric Dumazet <edumazet@google.com> Date: Wed Apr 18 11:43:15 2018 -0700 net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends After working on IP defragmentation lately, I found that some large packets defeat CHECKSUM_COMPLETE optimization because of NIC adding zero paddings on the last (small) fragment. While removing the padding with pskb_trim_rcsum(), we set skb->ip_summed to CHECKSUM_NONE, forcing a full csum validation, even if all prior fragments had CHECKSUM_COMPLETE set. We can instead compute the checksum of the part we are trimming, usually smaller than the part we keep. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
other useful info: # dmesg | grep -i sky2 [ 0.545661] sky2: driver version 1.30 [ 0.545781] sky2 0000:06:00.0: Yukon-2 EC Ultra chip revision 3 [ 0.546067] sky2 0000:06:00.0 eth0: addr 00:24:8c:xx:xx:xx [ 0.546188] sky2 0000:04:00.0: Yukon-2 EC Ultra chip revision 3 [ 0.546484] sky2 0000:04:00.0 eth1: addr 00:24:8c:xx:xx:xx [ 38.043074] sky2 0000:06:00.0 eth0: enabling interface [ 39.842161] sky2 0000:06:00.0 eth0: Link is up at 100 Mbps, full duplex, flow control rx
I have applied the commit db4f1be3ca9b0ef7330763d07bf4ace83ad6f913 on top of kernel 4.19.0 which seems to solve the problem