Message-ID: <53bb866f5bb12cc1b6c33b3866007f2b@wizardsworks.org>
Date: Mon, 09 Jun 2025 15:43:41 -0700
From: Greg Chandler <chandleg@...ardsworks.org>
To: stable@...r.kernel.org
Cc: netdev@...r.kernel.org
Subject: Tulip 21142 panic on physical link disconnect


This is a from-scratch build (non-vendor/non-distribution)
Host/Target = alpha ev6
Kernel source = 6.12.12

My last working kernel on this was a 2.6.x, it's been a while since I've 
had time to bring this system up to date, so I don't know when this may 
have started.
I had a 3.0.102 in there, but I didn't test the networking while using 
it.

Please let me know what I can do to help out with figuring this one out.


The kernel output:
[    0.692382] net eth0: Digital DS21142/43 Tulip rev 65 at MMIO 
0xa120000, 08:00:2b:86:ab:b1, IRQ 29
[    0.710937] net eth1: Digital DS21142/43 Tulip rev 65 at MMIO 
0xa121000, 08:00:2b:86:a8:5b, IRQ 30
[    0.989257] e1000 0000:00:10.0 eth2: (PCI:33MHz:64-bit) 
00:02:b3:f3:e6:3d
[    0.990233] e1000 0000:00:10.0 eth2: Intel(R) PRO/1000 Network 
Connection
[    6.088864] tulip 0000:00:09.0 eth126: renamed from eth0
[    6.103512] tulip 0000:00:09.0 rename_eth126: renamed from eth126
[    6.164059] e1000 0000:00:10.0 eth124: renamed from eth2
[    6.172848] e1000 0000:00:10.0 eth0: renamed from eth124
[    6.207028] tulip 0000:00:09.0 eth2: renamed from rename_eth126
[   18.957998] net eth2: Using user-specified media 10baseT-FDX
[   19.082021] net eth2: 21143 10baseT link beat good


I attempted to set the interface to 100MB/FDX with mii-tool but didn't 
seem to be having any luck, so I disconnected the cord, and it dropped 
this immediately:

[  195.170798] ------------[ cut here ]------------
[  195.170798] WARNING: CPU: 0 PID: 0 at kernel/time/timer.c:1657 
__timer_delete_sync+0x104/0x120
[  195.170798] Modules linked in: loop
[  195.170798] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.12.12 #4
[  195.170798]        fffffc0000c83ab0 fffffc0000388c94 fffffc0000326744 
fffffc0000afbee8
[  195.170798]        0000000000000000 fffffc0000388c94 fffffc00009e0d70 
0000000000000000
[  195.170798]        fffffc0000afbee8 0000000000000679 fffffc0000388c94 
0000000000000009
[  195.170798]        fffffc0000cf9100 0000000000000000 fffffc0000388c94 
0000000000000000
[  195.170798]        fffffc00020e6000 fffffc00020e73d0 fffffffff0669000 
fffffd000a120000
[  195.170798]        fffffc00007cff70 fffffc00024b5c00 0000000000000000 
0000000000000122
[  195.170798] Trace:
[  195.170798] [<fffffc0000388c94>] __timer_delete_sync+0x104/0x120
[  195.170798] [<fffffc0000326744>] __warn+0x194/0x1a0
[  195.170798] [<fffffc0000388c94>] __timer_delete_sync+0x104/0x120
[  195.170798] [<fffffc00009e0d70>] warn_slowpath_fmt+0x84/0xf0
[  195.170798] [<fffffc0000388c94>] __timer_delete_sync+0x104/0x120
[  195.170798] [<fffffc0000388c94>] __timer_delete_sync+0x104/0x120
[  195.170798] [<fffffc00007cff70>] usb_hcd_poll_rh_status+0x140/0x1a0
[  195.170798] [<fffffc0000919a2c>] tcp_orphan_update+0x6c/0x90
[  195.170798] [<fffffc000038be64>] timekeeping_update+0xd4/0x290
[  195.170798] [<fffffc0000780fdc>] t21142_lnk_change+0x1bc/0x790
[  195.170798] [<fffffc000077a890>] tulip_interrupt+0x280/0xac0
[  195.170798] [<fffffc0000372b90>] __handle_irq_event_percpu+0x60/0x180
[  195.170798] [<fffffc0000372d30>] handle_irq_event_percpu+0x80/0xa0
[  195.170798] [<fffffc0000372d98>] handle_irq_event+0x48/0xe0
[  195.170798] [<fffffc0000377af0>] handle_level_irq+0xc0/0x1f0
[  195.170798] [<fffffc0000315300>] handle_irq+0x70/0xe0
[  195.170798] [<fffffc000031d6c0>] dp264_srm_device_interrupt+0x30/0x50
[  195.170798] [<fffffc00003153dc>] do_entInt+0x6c/0x1c0
[  195.170798] [<fffffc0000310cc0>] ret_from_sys_call+0x0/0x10
[  195.170798] [<fffffc000035c69c>] pick_task_fair+0x3c/0x100
[  195.170798] [<fffffc000035d89c>] task_non_contending+0x6c/0x2a0
[  195.170798] [<fffffc000035fc28>] do_idle+0x58/0x190
[  195.170798] [<fffffc00009eda20>] cpu_idle_poll.isra.0+0x0/0x60
[  195.170798] [<fffffc00009eda50>] cpu_idle_poll.isra.0+0x30/0x60
[  195.170798] [<fffffc0000360058>] cpu_startup_entry+0x38/0x50
[  195.170798] [<fffffc00009edbc8>] rest_init+0xe8/0xec
[  195.170798] [<fffffc000031001c>] _stext+0x1c/0x20
[  195.170798] [<fffffc0000312460>] common_shutdown_1+0x0/0x150

[  195.170798] ---[ end trace 0000000000000000 ]---


Kernel options that may be relevant:
CONFIG_ALPHA_DP264=y
CONFIG_NET_TULIP=y
CONFIG_TULIP=y
CONFIG_TULIP_MWI=y
CONFIG_TULIP_MMIO=y
CONFIG_TULIP_NAPI=y
CONFIG_TULIP_NAPI_HW_MITIGATION=y


Device info:
root@...bang:~# lspci -vvv |more
00:09.0 Ethernet controller: Digital Equipment Corporation DECchip 
21142/43 (rev 41)
         Subsystem: Digital Equipment Corporation DE500B Fast Ethernet
         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- 
ParErr- Stepping- SERR- FastB2B- DisINTx-
         Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
         Latency: 255 (5000ns min, 10000ns max), Cache Line Size: 64 
bytes
         Interrupt: pin A routed to IRQ 29
         Region 0: I/O ports at 8400 [size=128]
         Region 1: Memory at 0a120000 (32-bit, non-prefetchable) 
[size=1K]
         Expansion ROM at 0a000000 [disabled] [size=256K]
         Kernel driver in use: tulip

00:0b.0 Ethernet controller: Digital Equipment Corporation DECchip 
21142/43 (rev 41)
         Subsystem: Digital Equipment Corporation DE500B Fast Ethernet
         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- 
ParErr- Stepping- SERR- FastB2B- DisINTx-
         Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
         Latency: 255 (5000ns min, 10000ns max), Cache Line Size: 64 
bytes
         Interrupt: pin A routed to IRQ 30
         Region 0: I/O ports at 8480 [size=128]
         Region 1: Memory at 0a121000 (32-bit, non-prefetchable) 
[size=1K]
         Expansion ROM at 0a040000 [disabled] [size=256K]
         Kernel driver in use: tulip

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