Hi, after switching from kernel version 5.10.65 to 5.15.1 I recognized a failing unregistration of the SMSC9500A chip during shut down the system. We build the kernel and all other needed stuff from scratch for an i.MX6Q module (armv7l) provided by TQ-Systems GmbH for our own base-board. For this we are using ptxdist as environment/building tool together with the OSELAS-Toolchain as cross-compiler. Since kernel 3.16 we had now issue like that... Because we just upgrade from LTS to LTS versions, I can only say that the issue till kernel 5.10.65 does not exist. Following kernel-messages show the issue with kernel 5.15.1: [ 4618.628115] systemd-shutdown[1]: Syncing filesystems and block devices. [ 4618.640864] systemd-shutdown[1]: Sending SIGTERM to remaining processes... [ 4618.717308] systemd-journald[271]: Received SIGTERM from PID 1 (systemd-shutdow). [ 4618.796390] systemd-shutdown[1]: Sending SIGKILL to remaining processes... [ 4618.934280] systemd-shutdown[1]: Unmounting file systems. [ 4618.943841] systemd-shutdown[1]: All filesystems unmounted. [ 4618.949521] systemd-shutdown[1]: Deactivating swaps. [ 4618.955153] systemd-shutdown[1]: All swaps deactivated. [ 4618.960444] systemd-shutdown[1]: Detaching loop devices. [ 4618.992064] systemd-shutdown[1]: All loop devices detached. [ 4618.997715] systemd-shutdown[1]: Stopping MD devices. [ 4619.004229] systemd-shutdown[1]: All MD devices stopped. [ 4619.009606] systemd-shutdown[1]: Detaching DM devices. [ 4619.016161] systemd-shutdown[1]: All DM devices detached. [ 4619.021697] systemd-shutdown[1]: All filesystems, swaps, loop devices, MD devices and DM devices detached. [ 4619.046361] systemd-shutdown[1]: Syncing filesystems and block devices. [ 4619.058484] systemd-shutdown[1]: Halting system. [ 4619.068511] ci_hdrc ci_hdrc.1: remove, state 1 [ 4619.075005] usb usb2: USB disconnect, device number 1 [ 4619.080273] usb 2-1: USB disconnect, device number 2 [ 4619.085742] usb 2-1.1: USB disconnect, device number 3 [ 4619.435503] ci_hdrc ci_hdrc.1: USB bus 2 deregistered [ 4619.445224] ci_hdrc ci_hdrc.0: remove, state 1 [ 4619.449741] usb usb1: USB disconnect, device number 1 [ 4619.455127] usb 1-1: USB disconnect, device number 2 [ 4619.467720] smsc95xx 1-1:1.0 eth1: unregister 'smsc95xx' usb-ci_hdrc.0-1, smsc95xx USB 2.0 Ethernet [ 4619.517252] smsc95xx 1-1:1.0 eth1: Link is Down [ 4619.522698] ------------[ cut here ]------------ [ 4619.527500] WARNING: CPU: 2 PID: 1 at fs/kernfs/dir.c:1535 kernfs_remove_by_name_ns+0x90/0x9c [ 4619.536207] kernfs: can not remove 'attached_dev', no directory [ 4619.542428] Modules linked in: [ 4619.545546] CPU: 2 PID: 1 Comm: systemd-shutdow Not tainted 5.15.1-20211106-g1a66115308ea #1 [ 4619.554017] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) [ 4619.560571] Backtrace: [ 4619.563055] [<811f171c>] (dump_backtrace) from [<811f1d8c>] (show_stack+0x20/0x24) [ 4619.570681] r7:000005ff r6:00000000 r5:816c2d30 r4:600f0013 [ 4619.576362] [<811f1d6c>] (show_stack) from [<811fcd50>] (dump_stack_lvl+0x60/0x78) [ 4619.583975] [<811fccf0>] (dump_stack_lvl) from [<811fcd80>] (dump_stack+0x18/0x1c) [ 4619.591585] r7:000005ff r6:00000009 r5:80484248 r4:816e0960 [ 4619.597265] [<811fcd68>] (dump_stack) from [<8013cee0>] (__warn+0xfc/0x16c) [ 4619.604272] [<8013cde4>] (__warn) from [<811f2588>] (warn_slowpath_fmt+0xa8/0xe8) [ 4619.611799] r7:80484248 r6:000005ff r5:816e0960 r4:816e0a20 [ 4619.617480] [<811f24e4>] (warn_slowpath_fmt) from [<80484248>] (kernfs_remove_by_name_ns+0x90/0x9c) [ 4619.626571] r8:00000000 r7:81400ddc r6:00000000 r5:8177d02c r4:00000000 [ 4619.633294] [<804841b8>] (kernfs_remove_by_name_ns) from [<8048711c>] (sysfs_remove_link+0x30/0x34) [ 4619.642385] r6:841aa9d4 r5:841aa000 r4:83c90800 [ 4619.647024] [<804870ec>] (sysfs_remove_link) from [<80c78ed0>] (phy_detach+0x104/0x15c) [ 4619.655065] [<80c78dcc>] (phy_detach) from [<80c78f74>] (phy_disconnect+0x4c/0x58) [ 4619.662671] r7:81400ddc r6:841aa9d4 r5:841aa700 r4:83c90800 [ 4619.668352] [<80c78f28>] (phy_disconnect) from [<80cd111c>] (smsc95xx_disconnect_phy+0x30/0x38) [ 4619.677093] r5:841aa700 r4:841aa700 [ 4619.680690] [<80cd10ec>] (smsc95xx_disconnect_phy) from [<80cd46f4>] (usbnet_stop+0x70/0x198) [ 4619.689255] r5:841aa700 r4:841aa000 [ 4619.692853] [<80cd4684>] (usbnet_stop) from [<80ef1b74>] (__dev_close_many+0xb4/0x138) [ 4619.700820] r8:00000001 r7:00000001 r6:00000000 r5:8255da0c r4:841aa000 [ 4619.707542] [<80ef1ac0>] (__dev_close_many) from [<80ef1c88>] (dev_close_many+0x90/0x12c) [ 4619.715761] r6:8255da0c r5:8255da24 r4:841aa000 [ 4619.720400] [<80ef1bf8>] (dev_close_many) from [<80ef9a48>] (unregister_netdevice_many+0x14c/0x534) [ 4619.729493] r8:00000001 r7:8255da0c r6:8255da5c r5:8255da24 r4:841aa000 [ 4619.736215] [<80ef98fc>] (unregister_netdevice_many) from [<80ef9edc>] (unregister_netdevice_queue+0xac/0xf4) [ 4619.746170] r10:00000003 r9:83c94880 r8:00000090 r7:83ef0820 r6:00000000 r5:00000000 [ 4619.754024] r4:841aa000 [ 4619.756580] [<80ef9e30>] (unregister_netdevice_queue) from [<80ef9f4c>] (unregister_netdev+0x28/0x30) [ 4619.765836] r5:841aa000 r4:841aa000 [ 4619.769432] [<80ef9f24>] (unregister_netdev) from [<80cd3c74>] (usbnet_disconnect+0x64/0xe0) [ 4619.777908] r5:841aa000 r4:841aa700 [ 4619.781504] [<80cd3c10>] (usbnet_disconnect) from [<80ced254>] (usb_unbind_interface+0x94/0x288) [ 4619.790338] r5:81c84f7c r4:83ef0820 [ 4619.793935] [<80ced1c0>] (usb_unbind_interface) from [<80bda9d4>] (__device_release_driver+0x220/0x22c) [ 4619.803374] r10:00000003 r9:000000a8 r8:00000090 r7:81c84f7c r6:00000000 r5:81c84f7c [ 4619.811227] r4:83ef0820 [ 4619.813781] [<80bda7b4>] (__device_release_driver) from [<80bdaa14>] (device_release_driver+0x34/0x40) [ 4619.823128] r9:000000a8 r8:83c94880 r7:00080000 r6:81c853a4 r5:83ef08b0 r4:83ef0820 [ 4619.830893] [<80bda9e0>] (device_release_driver) from [<80bd9ae8>] (bus_remove_device+0xf4/0x14c) [ 4619.839802] r5:83ef0820 r4:82655c50 [ 4619.843398] [<80bd99f4>] (bus_remove_device) from [<80bd3d04>] (device_del+0x190/0x3f4) [ 4619.851448] r7:00080000 r6:823b9bc8 r5:83ef08b0 r4:83ef0820 [ 4619.857128] [<80bd3b74>] (device_del) from [<80ceabbc>] (usb_disable_device+0x114/0x234) [ 4619.865263] r10:00000003 r9:000000a8 r8:83d91d08 r7:81ce9e88 r6:00000000 r5:83ef0800 [ 4619.873116] r4:83c94800 [ 4619.875671] [<80ceaaa8>] (usb_disable_device) from [<80ce07b8>] (usb_disconnect+0x108/0x28c) [ 4619.884150] r10:827b54a0 r9:83c94910 r8:83c94880 r7:00000001 r6:83c94800 r5:84104c00 [ 4619.892002] r4:83b34000 [ 4619.894557] [<80ce06b0>] (usb_disconnect) from [<80ce076c>] (usb_disconnect+0xbc/0x28c) [ 4619.902598] r10:827b54a0 r9:83c95910 r8:83c95880 r7:00000001 r6:83c95800 r5:83b34400 [ 4619.910450] r4:8255dc58 [ 4619.913004] [<80ce06b0>] (usb_disconnect) from [<812043a4>] (usb_remove_hcd+0xdc/0x170) [ 4619.921048] r10:827b54a0 r9:8176c1f4 r8:00000090 r7:83b37410 r6:8400b040 r5:83c9693c [ 4619.928900] r4:83c96800 [ 4619.931455] [<812042c8>] (usb_remove_hcd) from [<80d31b24>] (host_stop+0x48/0xf4) [ 4619.938984] r5:83c96800 r4:8400a040 [ 4619.942580] [<80d31adc>] (host_stop) from [<80d31ee0>] (ci_hdrc_host_destroy+0x34/0x38) [ 4619.950624] r7:83b37410 r6:8400b040 r5:83b37400 r4:8400a040 [ 4619.956304] [<80d31eac>] (ci_hdrc_host_destroy) from [<80d2a0cc>] (ci_hdrc_remove+0x54/0x130) [ 4619.964864] [<80d2a078>] (ci_hdrc_remove) from [<80bdd8e0>] (platform_remove+0x30/0x5c) [ 4619.972909] r7:81c8809c r6:00000000 r5:81c8809c r4:83b37410 [ 4619.978590] [<80bdd8b0>] (platform_remove) from [<80bda920>] (__device_release_driver+0x16c/0x22c) [ 4619.987588] r5:81c8809c r4:83b37410 [ 4619.991184] [<80bda7b4>] (__device_release_driver) from [<80bdaa14>] (device_release_driver+0x34/0x40) [ 4620.000531] r9:8176c1f4 r8:827b5410 r7:00000000 r6:81c77240 r5:83b374a0 r4:83b37410 [ 4620.008295] [<80bda9e0>] (device_release_driver) from [<80bd9ae8>] (bus_remove_device+0xf4/0x14c) [ 4620.017203] r5:83b37410 r4:8256d050 [ 4620.020799] [<80bd99f4>] (bus_remove_device) from [<80bd3d04>] (device_del+0x190/0x3f4) [ 4620.028844] r7:00000000 r6:823b9bc8 r5:83b374a0 r4:83b37410 [ 4620.034524] [<80bd3b74>] (device_del) from [<80bddc3c>] (platform_device_del.part.0+0x20/0x84) [ 4620.043180] r10:827b54a0 r9:8176c1f4 r8:81cff018 r7:823b9bc8 r6:827b5410 r5:83b37400 [ 4620.051032] r4:83b37400 [ 4620.053587] [<80bddc1c>] (platform_device_del.part.0) from [<80bde0a0>] (platform_device_unregister+0x28/0x34) [ 4620.063627] r5:827eb400 r4:83b37400 [ 4620.067224] [<80bde078>] (platform_device_unregister) from [<80d29850>] (ci_hdrc_remove_device+0x1c/0x30) [ 4620.076828] r5:827eb400 r4:00000000 [ 4620.080424] [<80d29834>] (ci_hdrc_remove_device) from [<80d34210>] (ci_hdrc_imx_remove+0x38/0x120) [ 4620.089424] r5:827eb400 r4:827b5400 [ 4620.093020] [<80d341d8>] (ci_hdrc_imx_remove) from [<80d34310>] (ci_hdrc_imx_shutdown+0x18/0x1c) [ 4620.101848] r7:823b9bc8 r6:827b5410 r5:827b4410 r4:827b5414 [ 4620.107530] [<80d342f8>] (ci_hdrc_imx_shutdown) from [<80bdd148>] (platform_shutdown+0x34/0x38) [ 4620.116266] [<80bdd114>] (platform_shutdown) from [<80bd80b8>] (device_shutdown+0x194/0x260) [ 4620.124739] [<80bd7f24>] (device_shutdown) from [<80171ee8>] (kernel_halt+0x48/0x1f8) [ 4620.132617] r10:00000058 r9:8255c000 r8:fee1dead r7:81a25e94 r6:cdef0123 r5:cdef0123 [ 4620.140470] r4:000065f4 [ 4620.143025] [<80171ea0>] (kernel_halt) from [<801723bc>] (__do_sys_reboot+0x218/0x258) [ 4620.150983] r7:81a25e94 r6:cdef0123 r5:cdef0123 r4:00000000 [ 4620.156664] [<801721a4>] (__do_sys_reboot) from [<80172414>] (sys_reboot+0x18/0x1c) [ 4620.164362] r8:80100224 r7:00000058 r6:00000000 r5:00000000 r4:00000000 [ 4620.171084] [<801723fc>] (sys_reboot) from [<80100060>] (ret_fast_syscall+0x0/0x1c) [ 4620.178777] Exception stack(0x8255dfa8 to 0x8255dff0) [ 4620.183859] dfa0: 00000000 00000000 fee1dead 28121969 cdef0123 cdef0123 [ 4620.192064] dfc0: 00000000 00000000 00000000 00000058 00000000 00000003 00000000 00000000 [ 4620.200267] dfe0: 00000058 7eaf4c6c 76c73965 76bf2196 [ 4620.206331] irq event stamp: 651781 [ 4620.209864] hardirqs last enabled at (651789): [<801bb2a0>] __up_console_sem+0x60/0x70 [ 4620.218006] hardirqs last disabled at (651798): [<801bb28c>] __up_console_sem+0x4c/0x70 [ 4620.226135] softirqs last enabled at (651776): [<80101744>] __do_softirq+0x384/0x61c [ 4620.234086] softirqs last disabled at (651759): [<801466d0>] __irq_exit_rcu+0x144/0x1b8 [ 4620.242212] ---[ end trace 982eb6f2ea72e8bb ]--- [ 4620.350387] ci_hdrc ci_hdrc.0: USB bus 1 deregistered [ 4620.380489] reboot: System halted Although we had on our base-board just a SMSC9500A chip there will be mentioned a "SMSC LAN8710/LAN8720" during establishing a network connection on this port. If I compare drivers/net/phy/smsc.c for 5.10.65 and 5.15.1 then there were made some changes - I think of the note: /* This covers internal PHY (phy_id: 0x0007C0F0) for * LAN9500A (PID: 0x9E00), LAN9505A (PID: 0x9E01) */ Please ask if you need some further details to understand/solve this issue. Thanks in advance. RK
Update: The issue only occurs if the network interface has an IP-address.
(In reply to robert.knebel from comment #1) > Update: > The issue only occurs if the network interface has an IP-address. [ 98.536900] systemd-shutdown[1]: Sending SIGKILL to remaining processes... [ 98.692559] systemd-shutdown[1]: Unmounting file systems. [ 98.700996] systemd-shutdown[1]: All filesystems unmounted. [ 98.707151] systemd-shutdown[1]: Deactivating swaps. [ 98.712717] systemd-shutdown[1]: All swaps deactivated. [ 98.718008] systemd-shutdown[1]: Detaching loop devices. [ 98.745831] systemd-shutdown[1]: All loop devices detached. [ 98.751606] systemd-shutdown[1]: Stopping MD devices. [ 98.758039] systemd-shutdown[1]: All MD devices stopped. [ 98.768603] systemd-shutdown[1]: Detaching DM devices. [ 98.775417] systemd-shutdown[1]: All DM devices detached. [ 98.780886] systemd-shutdown[1]: All filesystems, swaps, loop devices, MD devices and DM devices detached. [ 98.814290] systemd-shutdown[1]: Syncing filesystems and block devices. [ 98.825455] systemd-shutdown[1]: Halting system. [ 98.835494] ci_hdrc ci_hdrc.1: remove, state 1 [ 98.840331] usb usb2: USB disconnect, device number 1 [ 98.845737] usb 2-1: USB disconnect, device number 2 [ 98.850899] usb 2-1.1: USB disconnect, device number 3 [ 99.256337] ci_hdrc ci_hdrc.1: USB bus 2 deregistered [ 99.266413] ci_hdrc ci_hdrc.0: remove, state 1 [ 99.270929] usb usb1: USB disconnect, device number 1 [ 99.276167] usb 1-1: USB disconnect, device number 2 [ 99.282989] smsc95xx 1-1:1.0 eth1: unregister 'smsc95xx' usb-ci_hdrc.0-1, smsc95xx USB 2.0 Ethernet [ 99.410040] ci_hdrc ci_hdrc.0: USB bus 1 deregistered [ 99.466320] reboot: System halted And now (on success) the following message is missing: smsc95xx 1-1:1.0 eth1: Link is Down