On Fri, Mar 4, 2022 at 12:57 PM Fabio Estevam <festevam@xxxxxxxxx> wrote: > > On Fri, Mar 4, 2022 at 11:51 AM Andrew Lunn <andrew@xxxxxxx> wrote: > > > But why does it return ENODEV? It seems to me, ignoring it is papering > > over the cracks. Why cannot we access to the PHY? > > The -ENODEV is returned by usb_control_msg(): > > __smsc95xx_read_reg: -19 > usbnet_read_cmd: -19 > usb_control_msg: -19 I added a WARN_ON() inside usb_control_msg() that triggers when usb_control_msg() returns -ENODEV. Here are the results on two unbind commands: root@iotgate:~# echo -n "2-1" > /sys/bus/usb/drivers/usb/unbind [ 19.989294] usb 2-1.1: USB disconnect, device number 3 [ 19.994484] ********** returning -ENODEV from usb_control_msg [ 20.000555] ------------[ cut here ]------------ [ 20.005172] WARNING: CPU: 0 PID: 7 at drivers/usb/core/message.c:163 usb_control_msg+0x178/0x180 [ 20.013970] Modules linked in: [ 20.017028] CPU: 0 PID: 7 Comm: kworker/u8:0 Not tainted 5.17.0-rc6-dirty #581 [ 20.024254] Hardware name: CompuLab i.MX8MM IoT Gateway (DT) [ 20.029913] Workqueue: events_power_efficient phy_state_machine [ 20.035842] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 20.042807] pc : usb_control_msg+0x178/0x180 [ 20.047080] lr : usb_control_msg+0x178/0x180 [ 20.051357] sp : ffff80000965bb10 [ 20.054670] x29: ffff80000965bb10 x28: 0000000000000040 x27: 00000000000000a0 [ 20.061811] x26: 0000000000000000 x25: 0000000000000114 x24: 0000000000000004 [ 20.068955] x23: 0000000080000300 x22: ffff000006812000 x21: ffff000000095400 [ 20.076098] x20: 00000000ffffffed x19: ffff00000f26ea80 x18: 0000000000000010 [ 20.083242] x17: ffff8000768f5000 x16: ffff800008004000 x15: 000011acfbd3184b [ 20.090385] x14: 0000000000000159 x13: 0000000000000001 x12: 0000000000000000 [ 20.097527] x11: 0000000000000000 x10: 00000000000009a0 x9 : ffff80000965b8b0 [ 20.104671] x8 : ffff000000095e00 x7 : ffff00007fb70b40 x6 : 0000000000000107 [ 20.111814] x5 : ffff00007fb6a998 x4 : 0000000000000000 x3 : 0000000000000027 [ 20.118957] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000031 [ 20.126104] Call trace: [ 20.128549] usb_control_msg+0x178/0x180 [ 20.132479] __usbnet_write_cmd.isra.0+0x8c/0xd8 [ 20.137098] usbnet_write_cmd+0x64/0xa0 [ 20.140936] __smsc95xx_write_reg+0x6c/0xc8 [ 20.145125] __smsc95xx_mdio_read+0x78/0x160 [ 20.149400] smsc95xx_mdiobus_read+0x18/0x28 [ 20.153674] mdiobus_read+0x40/0x80 [ 20.157167] lan87xx_read_status+0xe4/0x158 [ 20.161355] phy_check_link_status+0x48/0xc0 [ 20.165628] phy_state_machine+0x1a8/0x228 [ 20.169729] process_one_work+0x1c0/0x338 [ 20.173742] worker_thread+0x50/0x420 [ 20.177407] kthread+0x110/0x120 [ 20.180641] ret_from_fork+0x10/0x20 [ 20.184221] ---[ end trace 0000000000000000 ]--- [ 20.188952] smsc95xx 2-1.1:1.0 eth1: unregister 'smsc95xx' usb-ci_hdrc.1-1.1, smsc95xx USB 2.0 Ethernet [ 20.246723] smsc95xx 2-1.1:1.0 eth1: Failed to write reg index 0x00000114: -19 [ 20.253972] smsc95xx 2-1.1:1.0 eth1: Error writing MII_ADDR [ 20.259678] ********** returning -ENODEV from usb_control_msg [ 20.265480] ------------[ cut here ]------------ [ 20.270099] WARNING: CPU: 0 PID: 257 at drivers/usb/core/message.c:163 usb_control_msg+0x178/0x180 [ 20.279075] Modules linked in: [ 20.282135] CPU: 0 PID: 257 Comm: sh Tainted: G W 5.17.0-rc6-dirty #581 [ 20.290055] Hardware name: CompuLab i.MX8MM IoT Gateway (DT) [ 20.295715] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 20.302681] pc : usb_control_msg+0x178/0x180 [ 20.306956] lr : usb_control_msg+0x178/0x180 [ 20.311234] sp : ffff800009c3b310 [ 20.314546] x29: ffff800009c3b310 x28: 00000000000000c0 x27: 00000000000000a1 [ 20.321692] x26: 0000000000000000 x25: 0000000000000114 x24: 0000000000000004 [ 20.328837] x23: 0000000080000380 x22: ffff000006812000 x21: ffff00000d950e00 [ 20.335982] x20: 00000000ffffffed x19: ffff00000f26ea00 x18: 0000000000000010 [ 20.343125] x17: 0000000000000000 x16: 0000000000000000 x15: ffff00000d951280 [ 20.350270] x14: 0000000000000169 x13: ffff00000d951280 x12: 00000000ffffffea [ 20.357417] x11: ffff8000094a1b28 x10: ffff800009489ae8 x9 : ffff800009489b40 [ 20.364559] x8 : 0000000000017fe8 x7 : c0000000ffffefff x6 : 0000000000000001 [ 20.371703] x5 : 0000000000000000 x4 : ffff00007fb6a998 x3 : ffff00007fb6da08 [ 20.378848] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000031 [ 20.385995] Call trace: [ 20.388441] usb_control_msg+0x178/0x180 [ 20.392371] __usbnet_read_cmd.isra.0+0x8c/0x130 [ 20.396993] usbnet_read_cmd+0x64/0xa0 [ 20.400744] __smsc95xx_read_reg+0x6c/0xd8 [ 20.404845] __smsc95xx_phy_wait_not_busy+0x60/0xc8 [ 20.409729] __smsc95xx_mdio_read+0x54/0x160 [ 20.414007] smsc95xx_mdiobus_read+0x18/0x28 [ 20.418282] __mdiobus_modify_changed+0x44/0xe0 [ 20.422817] phy_modify+0x48/0x78 [ 20.426140] genphy_suspend+0x1c/0x28 [ 20.429804] phy_suspend+0xa8/0xe8 [ 20.433210] phy_state_machine+0x19c/0x228 [ 20.437310] phy_stop+0x5c/0x198 [ 20.440542] phy_disconnect+0x58/0x60 [ 20.444207] smsc95xx_unbind+0x20/0x48 [ 20.447958] usbnet_disconnect+0x40/0xc8 [ 20.451887] usb_unbind_interface+0x74/0x248 [ 20.456161] device_release_driver_internal+0x1fc/0x200 [ 20.461395] device_release_driver+0x18/0x28 [ 20.465669] bus_remove_device+0x128/0x138 [ 20.469768] device_del+0x16c/0x3a8 [ 20.473261] usb_disable_device+0x8c/0x158 [ 20.477363] usb_disconnect+0xb8/0x2a0 [ 20.481116] hub_quiesce+0x78/0xd0 [ 20.484523] hub_disconnect+0x50/0x190 [ 20.488276] usb_unbind_interface+0x74/0x248 [ 20.492551] device_release_driver_internal+0x1fc/0x200 [ 20.497781] device_release_driver+0x18/0x28 [ 20.502055] bus_remove_device+0x128/0x138 [ 20.506157] device_del+0x16c/0x3a8 [ 20.509646] usb_disable_device+0x8c/0x158 [ 20.513750] usb_set_configuration+0x538/0x898 [ 20.518202] usb_generic_driver_disconnect+0x2c/0x40 [ 20.523176] usb_unbind_device+0x30/0x98 [ 20.527100] device_release_driver_internal+0x1fc/0x200 [ 20.532333] device_driver_detach+0x18/0x28 [ 20.536524] unbind_store+0xe0/0x108 [ 20.540101] drv_attr_store+0x24/0x38 [ 20.543769] sysfs_kf_write+0x44/0x58 [ 20.547434] kernfs_fop_write_iter+0x118/0x1a8 [ 20.551881] new_sync_write+0xe8/0x190 [ 20.555638] vfs_write+0x234/0x378 [ 20.559048] ksys_write+0x6c/0x100 [ 20.562457] __arm64_sys_write+0x1c/0x28 [ 20.566388] invoke_syscall+0x44/0x108 [ 20.570140] el0_svc_common.constprop.0+0xcc/0xf0 [ 20.574848] do_el0_svc+0x24/0x88 [ 20.578165] el0_svc+0x20/0x60 [ 20.581228] el0t_64_sync_handler+0xb0/0xb8 [ 20.585415] el0t_64_sync+0x1a0/0x1a4 [ 20.589083] ---[ end trace 0000000000000000 ]--- [ 20.594738] smsc95xx 2-1.1:1.0 eth1: Failed to read reg index 0x00000114: -19 [ 20.601903] smsc95xx 2-1.1:1.0 eth1: Error reading MII_ACCESS [ 20.607687] smsc95xx 2-1.1:1.0 eth1: __smsc95xx_mdio_read: MII is busy [ 20.618737] ********** returning -ENODEV from usb_control_msg [ 20.624562] ------------[ cut here ]------------ [ 20.629180] WARNING: CPU: 3 PID: 257 at drivers/usb/core/message.c:163 usb_control_msg+0x178/0x180 [ 20.638154] Modules linked in: [ 20.641213] CPU: 3 PID: 257 Comm: sh Tainted: G W 5.17.0-rc6-dirty #581 [ 20.649133] Hardware name: CompuLab i.MX8MM IoT Gateway (DT) [ 20.654794] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 20.661759] pc : usb_control_msg+0x178/0x180 [ 20.666032] lr : usb_control_msg+0x178/0x180 [ 20.670311] sp : ffff800009c3b370 [ 20.673623] x29: ffff800009c3b370 x28: 00000000000000c0 x27: 00000000000000a1 [ 20.680766] x26: 0000000000000000 x25: 0000000000000114 x24: 0000000000000004 [ 20.687911] x23: 0000000080000380 x22: ffff000006812000 x21: ffff00000d950e00 [ 20.695058] x20: 00000000ffffffed x19: ffff00000f0c6780 x18: 0000000000000010 [ 20.702199] x17: ffff80007692e000 x16: ffff8000095e4000 x15: ffff00000d951280 [ 20.709345] x14: 00000000000001b4 x13: ffff00000d951280 x12: 00000000ffffffea [ 20.716490] x11: ffff8000094a1b28 x10: ffff800009489ae8 x9 : ffff800009489b40 [ 20.723634] x8 : 0000000000017fe8 x7 : c0000000ffffefff x6 : 0000000000000001 [ 20.730778] x5 : 0000000000000000 x4 : ffff00007fba3998 x3 : ffff00007fba6a08 [ 20.737921] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000031 [ 20.745068] Call trace: [ 20.747514] usb_control_msg+0x178/0x180 [ 20.751445] __usbnet_read_cmd.isra.0+0x8c/0x130 [ 20.756064] usbnet_read_cmd+0x64/0xa0 [ 20.759816] __smsc95xx_read_reg+0x6c/0xd8 [ 20.763920] __smsc95xx_phy_wait_not_busy+0x60/0xc8 [ 20.768803] __smsc95xx_mdio_read+0x54/0x160 [ 20.773079] smsc95xx_mdiobus_read+0x18/0x28 [ 20.777356] __mdiobus_modify_changed+0x44/0xe0 [ 20.781891] phy_modify+0x48/0x78 [ 20.785210] genphy_suspend+0x1c/0x28 [ 20.788878] phy_suspend+0xa8/0xe8 [ 20.792280] phy_detach+0x30/0x110 [ 20.795686] phy_disconnect+0x44/0x60 [ 20.799349] smsc95xx_unbind+0x20/0x48 [ 20.803102] usbnet_disconnect+0x40/0xc8 [ 20.807030] usb_unbind_interface+0x74/0x248 [ 20.811305] device_release_driver_internal+0x1fc/0x200 [ 20.816535] device_release_driver+0x18/0x28 [ 20.820811] bus_remove_device+0x128/0x138 [ 20.824909] device_del+0x16c/0x3a8 [ 20.828400] usb_disable_device+0x8c/0x158 [ 20.832504] usb_disconnect+0xb8/0x2a0 [ 20.836256] hub_quiesce+0x78/0xd0 [ 20.839663] hub_disconnect+0x50/0x190 [ 20.843416] usb_unbind_interface+0x74/0x248 [ 20.847689] device_release_driver_internal+0x1fc/0x200 [ 20.852921] device_release_driver+0x18/0x28 [ 20.857195] bus_remove_device+0x128/0x138 [ 20.861297] device_del+0x16c/0x3a8 [ 20.864786] usb_disable_device+0x8c/0x158 [ 20.868888] usb_set_configuration+0x538/0x898 [ 20.873340] usb_generic_driver_disconnect+0x2c/0x40 [ 20.878312] usb_unbind_device+0x30/0x98 [ 20.882236] device_release_driver_internal+0x1fc/0x200 [ 20.887469] device_driver_detach+0x18/0x28 [ 20.891658] unbind_store+0xe0/0x108 [ 20.895235] drv_attr_store+0x24/0x38 [ 20.898903] sysfs_kf_write+0x44/0x58 [ 20.902568] kernfs_fop_write_iter+0x118/0x1a8 [ 20.907015] new_sync_write+0xe8/0x190 [ 20.910773] vfs_write+0x234/0x378 [ 20.914181] ksys_write+0x6c/0x100 [ 20.917590] __arm64_sys_write+0x1c/0x28 [ 20.921521] invoke_syscall+0x44/0x108 [ 20.925273] el0_svc_common.constprop.0+0xcc/0xf0 [ 20.929983] do_el0_svc+0x24/0x88 [ 20.933302] el0_svc+0x20/0x60 [ 20.936365] el0t_64_sync_handler+0xb0/0xb8 [ 20.940557] el0t_64_sync+0x1a0/0x1a4 [ 20.944223] ---[ end trace 0000000000000000 ]--- [ 20.954744] smsc95xx 2-1.1:1.0 eth1: Failed to read reg index 0x00000114: -19 [ 20.961913] smsc95xx 2-1.1:1.0 eth1: Error reading MII_ACCESS [ 20.967696] smsc95xx 2-1.1:1.0 eth1: __smsc95xx_mdio_read: MII is busy [ 20.979207] smsc95xx 2-1.1:1.0 eth1: hardware isn't capable of remote wakeup [ 21.030745] usb 2-1.4: USB disconnect, device number 4 root@iotgate:~# echo -n "2-1" > /sys/bus/usb/drivers/usb/bind [ 48.591950] hub 2-1:1.0: USB hub found [ 48.595909] hub 2-1:1.0: 5 ports detected root@iotgate:~# [ 48.886892] usb 2-1.1: new high-speed USB device number 5 using ci_hdrc [ 49.002509] smsc95xx v2.0.0 [ 49.098891] SMSC LAN8700 usb-002:005:01: attached PHY driver (mii_bus:phy_addr=usb-002:005:01, irq=POLL) [ 49.110400] smsc95xx 2-1.1:1.0 eth1: register 'smsc95xx' at usb-ci_hdrc.1-1.1, smsc95xx USB 2.0 Ethernet, 00:01:c0:2f:36:3d [ 49.190808] smsc95xx 2-1.1:1.0 eth1: hardware isn't capable of remote wakeup [ 49.202758] usb 2-1.4: new full-speed USB device number 6 using ci_hdrc [ 49.212264] smsc95xx 2-1.1:1.0 eth1: Link is Down root@iotgate:~# root@iotgate:~# root@iotgate:~# echo -n "2-1" > /sys/bus/usb/drivers/usb/unbind [ 52.302633] usb 2-1.1: USB disconnect, device number 5 [ 52.310139] smsc95xx 2-1.1:1.0 eth1: unregister 'smsc95xx' usb-ci_hdrc.1-1.1, smsc95xx USB 2.0 Ethernet [ 52.319574] ********** returning -ENODEV from usb_control_msg [ 52.325388] ------------[ cut here ]------------ [ 52.330016] WARNING: CPU: 1 PID: 257 at drivers/usb/core/message.c:163 usb_control_msg+0x178/0x180 [ 52.338989] Modules linked in: [ 52.342050] CPU: 1 PID: 257 Comm: sh Tainted: G W 5.17.0-rc6-dirty #581 [ 52.349969] Hardware name: CompuLab i.MX8MM IoT Gateway (DT) [ 52.355629] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 52.362595] pc : usb_control_msg+0x178/0x180 [ 52.366868] lr : usb_control_msg+0x178/0x180 [ 52.371144] sp : ffff800009c3b310 [ 52.374456] x29: ffff800009c3b310 x28: 00000000000000c0 x27: 00000000000000a1 [ 52.381602] x26: 0000000000000000 x25: 0000000000000114 x24: 0000000000000004 [ 52.388747] x23: 0000000080000580 x22: ffff000006814800 x21: ffff00000d950e00 [ 52.395892] x20: 00000000ffffffed x19: ffff00000d021d80 x18: 0000000000000010 [ 52.403037] x17: 312e312d312e6372 x16: 64685f69632d6273 x15: ffff00000d951280 [ 52.410180] x14: 000000000000020b x13: ffff00000d951280 x12: 00000000ffffffea [ 52.417324] x11: ffff8000094a1b28 x10: ffff800009489ae8 x9 : ffff800009489b40 [ 52.424470] x8 : 0000000000017fe8 x7 : c0000000ffffefff x6 : 0000000000000001 [ 52.431612] x5 : 0000000000000000 x4 : ffff00007fb7d998 x3 : ffff00007fb80a08 [ 52.438757] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000031 [ 52.445904] Call trace: [ 52.448351] usb_control_msg+0x178/0x180 [ 52.452283] __usbnet_read_cmd.isra.0+0x8c/0x130 [ 52.456903] usbnet_read_cmd+0x64/0xa0 [ 52.460654] __smsc95xx_read_reg+0x6c/0xd8 [ 52.464757] __smsc95xx_phy_wait_not_busy+0x60/0xc8 [ 52.469641] __smsc95xx_mdio_read+0x54/0x160 [ 52.473918] smsc95xx_mdiobus_read+0x18/0x28 [ 52.478192] __mdiobus_modify_changed+0x44/0xe0 [ 52.482728] phy_modify+0x48/0x78 [ 52.486050] genphy_suspend+0x1c/0x28 [ 52.489714] phy_suspend+0xa8/0xe8 [ 52.493118] phy_state_machine+0x19c/0x228 [ 52.497218] phy_stop+0x5c/0x198 [ 52.500450] phy_disconnect+0x58/0x60 [ 52.504115] smsc95xx_unbind+0x20/0x48 [ 52.507870] usbnet_disconnect+0x40/0xc8 [ 52.511797] usb_unbind_interface+0x74/0x248 [ 52.516072] device_release_driver_internal+0x1fc/0x200 [ 52.521303] device_release_driver+0x18/0x28 [ 52.525579] bus_remove_device+0x128/0x138 [ 52.529679] device_del+0x16c/0x3a8 [ 52.533173] usb_disable_device+0x8c/0x158 [ 52.537276] usb_disconnect+0xb8/0x2a0 [ 52.541029] hub_quiesce+0x78/0xd0 [ 52.544436] hub_disconnect+0x50/0x190 [ 52.548189] usb_unbind_interface+0x74/0x248 [ 52.552463] device_release_driver_internal+0x1fc/0x200 [ 52.557695] device_release_driver+0x18/0x28 [ 52.561969] bus_remove_device+0x128/0x138 [ 52.566071] device_del+0x16c/0x3a8 [ 52.569561] usb_disable_device+0x8c/0x158 [ 52.573665] usb_set_configuration+0x538/0x898 [ 52.578117] usb_generic_driver_disconnect+0x2c/0x40 [ 52.583088] usb_unbind_device+0x30/0x98 [ 52.587011] device_release_driver_internal+0x1fc/0x200 [ 52.592244] device_driver_detach+0x18/0x28 [ 52.596436] unbind_store+0xe0/0x108 [ 52.600012] drv_attr_store+0x24/0x38 [ 52.603678] sysfs_kf_write+0x44/0x58 [ 52.607349] kernfs_fop_write_iter+0x118/0x1a8 [ 52.611800] new_sync_write+0xe8/0x190 [ 52.615555] vfs_write+0x234/0x378 [ 52.618962] ksys_write+0x6c/0x100 [ 52.622370] __arm64_sys_write+0x1c/0x28 [ 52.626300] invoke_syscall+0x44/0x108 [ 52.630053] el0_svc_common.constprop.0+0xcc/0xf0 [ 52.634763] do_el0_svc+0x24/0x88 [ 52.638080] el0_svc+0x20/0x60 [ 52.641142] el0t_64_sync_handler+0xb0/0xb8 [ 52.645335] el0t_64_sync+0x1a0/0x1a4 [ 52.649001] ---[ end trace 0000000000000000 ]--- [ 52.653704] smsc95xx 2-1.1:1.0 eth1: Failed to read reg index 0x00000114: -19 [ 52.660885] smsc95xx 2-1.1:1.0 eth1: Error reading MII_ACCESS [ 52.666664] smsc95xx 2-1.1:1.0 eth1: __smsc95xx_mdio_read: MII is busy [ 52.673255] ********** returning -ENODEV from usb_control_msg [ 52.679076] ------------[ cut here ]------------ [ 52.683697] WARNING: CPU: 1 PID: 257 at drivers/usb/core/message.c:163 usb_control_msg+0x178/0x180 [ 52.692671] Modules linked in: [ 52.695731] CPU: 1 PID: 257 Comm: sh Tainted: G W 5.17.0-rc6-dirty #581 [ 52.703651] Hardware name: CompuLab i.MX8MM IoT Gateway (DT) [ 52.709311] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 52.716276] pc : usb_control_msg+0x178/0x180 [ 52.720551] lr : usb_control_msg+0x178/0x180 [ 52.724827] sp : ffff800009c3b370 [ 52.728139] x29: ffff800009c3b370 x28: 00000000000000c0 x27: 00000000000000a1 [ 52.735285] x26: 0000000000000000 x25: 0000000000000114 x24: 0000000000000004 [ 52.742428] x23: 0000000080000580 x22: ffff000006814800 x21: ffff00000d950e00 [ 52.749573] x20: 00000000ffffffed x19: ffff00000d021d80 x18: 0000000000000010 [ 52.756718] x17: 312d203a34313130 x16: 3030303078302078 x15: ffff00000d951280 [ 52.763862] x14: 0000000000000256 x13: ffff00000d951280 x12: 00000000ffffffea [ 52.771005] x11: ffff8000094a1b28 x10: ffff800009489ae8 x9 : ffff800009489b40 [ 52.778150] x8 : 0000000000017fe8 x7 : c0000000ffffefff x6 : 0000000000000001 [ 52.785294] x5 : 0000000000000000 x4 : ffff00007fb7d998 x3 : ffff00007fb80a08 [ 52.792440] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000031 [ 52.799583] Call trace: [ 52.802030] usb_control_msg+0x178/0x180 [ 52.805960] __usbnet_read_cmd.isra.0+0x8c/0x130 [ 52.810579] usbnet_read_cmd+0x64/0xa0 [ 52.814330] __smsc95xx_read_reg+0x6c/0xd8 [ 52.818432] __smsc95xx_phy_wait_not_busy+0x60/0xc8 [ 52.823312] __smsc95xx_mdio_read+0x54/0x160 [ 52.827589] smsc95xx_mdiobus_read+0x18/0x28 [ 52.831867] __mdiobus_modify_changed+0x44/0xe0 [ 52.836401] phy_modify+0x48/0x78 [ 52.839721] genphy_suspend+0x1c/0x28 [ 52.843389] phy_suspend+0xa8/0xe8 [ 52.846791] phy_detach+0x30/0x110 [ 52.850195] phy_disconnect+0x44/0x60 [ 52.853859] smsc95xx_unbind+0x20/0x48 [ 52.857615] usbnet_disconnect+0x40/0xc8 [ 52.861544] usb_unbind_interface+0x74/0x248 [ 52.865819] device_release_driver_internal+0x1fc/0x200 [ 52.871049] device_release_driver+0x18/0x28 [ 52.875326] bus_remove_device+0x128/0x138 [ 52.879426] device_del+0x16c/0x3a8 [ 52.882918] usb_disable_device+0x8c/0x158 [ 52.887023] usb_disconnect+0xb8/0x2a0 [ 52.890774] hub_quiesce+0x78/0xd0 [ 52.894181] hub_disconnect+0x50/0x190 [ 52.897934] usb_unbind_interface+0x74/0x248 [ 52.902206] device_release_driver_internal+0x1fc/0x200 [ 52.907438] device_release_driver+0x18/0x28 [ 52.911714] bus_remove_device+0x128/0x138 [ 52.915815] device_del+0x16c/0x3a8 [ 52.919304] usb_disable_device+0x8c/0x158 [ 52.923409] usb_set_configuration+0x538/0x898 [ 52.927861] usb_generic_driver_disconnect+0x2c/0x40 [ 52.932832] usb_unbind_device+0x30/0x98 [ 52.936755] device_release_driver_internal+0x1fc/0x200 [ 52.941986] device_driver_detach+0x18/0x28 [ 52.946173] unbind_store+0xe0/0x108 [ 52.949750] drv_attr_store+0x24/0x38 [ 52.953418] sysfs_kf_write+0x44/0x58 [ 52.957086] kernfs_fop_write_iter+0x118/0x1a8 [ 52.961533] new_sync_write+0xe8/0x190 [ 52.965291] vfs_write+0x234/0x378 [ 52.968697] ksys_write+0x6c/0x100 [ 52.972104] __arm64_sys_write+0x1c/0x28 [ 52.976033] invoke_syscall+0x44/0x108 [ 52.979785] el0_svc_common.constprop.0+0xcc/0xf0 [ 52.984498] do_el0_svc+0x24/0x88 [ 52.987818] el0_svc+0x20/0x60 [ 52.990877] el0t_64_sync_handler+0xb0/0xb8 [ 52.995067] el0t_64_sync+0x1a0/0x1a4 [ 52.998736] ---[ end trace 0000000000000000 ]--- [ 53.003408] smsc95xx 2-1.1:1.0 eth1: Failed to read reg index 0x00000114: -19 [ 53.010584] smsc95xx 2-1.1:1.0 eth1: Error reading MII_ACCESS [ 53.016367] smsc95xx 2-1.1:1.0 eth1: __smsc95xx_mdio_read: MII is busy [ 53.023423] smsc95xx 2-1.1:1.0 eth1: hardware isn't capable of remote wakeup [ 53.059462] usb 2-1.4: USB disconnect, device number 6
