On 10/10/2017 01:38, Bjorn Helgaas wrote: > On Mon, Oct 09, 2017 at 10:45:39PM +0200, Mason wrote: >> On 09/10/2017 19:01, Bjorn Helgaas wrote: >> ... > >>> In that thread, Mason reported a regression that looks similar, but as >>> far as I can tell, we never identified a root cause. >>> >>> 1) The problem Mason reported was on a Tango platform, which has a >>> known hardware issue that corrupts data when simultaneous config >>> and MMIO accesses occur. You're seeing the problem on a >>> different platform, which is very helpful. >> >> As mentioned here: >> https://www.mail-archive.com/linux-usb@xxxxxxxxxxxxxxx/msg94020.html >> >> When I disable the AER driver, not a single config space access >> occurs when a USB drive is unplugged. So I'm 99.99% sure that >> the issue is NOT caused by tango's bad design. (I got the vibe >> that nobody cared about tango's issue because it was assumed >> that the design flaw was responsible for it.) > > I agree; I don't think this is Tango's fault. > > Can you test fe190ed0d602 and d9f11ba9f107 to determine whether > d9f11ba9f107 is the culprit? If it is the culprit, can you try reverting > it on a current kernel to see if that fixes it? > > If d9f11ba9f107 is not the culprit, can you bisect to discover exactly > where it broke? NOTE: tango PCIe support was not upstream in v4.11 Therefore, for all my tests, I cherry-pick the following patches on top of the reference mentioned: Tweak tango4_defconfig Disable sibling calls optimization Proper init Set up static virt_to_phys mapping for llad Show BROKEN drivers 8759 PCIe DT node PCI: Change pci_host_common_probe() visibility PCI: Improve __pci_read_base() robustness PCI: Include pci.h for struct pci_ops definition PCI: tango: Add MSI controller support PCI: tango: Add Sigma Designs Tango SMP8759 PCIe host bridge support Below are the result of my tests. ********* v4.11-rc5 : I CAN PLUG/UNPLUG SEVERAL TIMES ********* [ 9.598044] usb 2-2: new SuperSpeed USB device number 2 using xhci_hcd [ 9.637244] usb-storage 2-2:1.0: USB Mass Storage device detected [ 9.643687] scsi host0: usb-storage 2-2:1.0 [ 10.670685] scsi 0:0:0:0: Direct-Access Kingston DataTraveler 3.0 PQ: 0 ANSI: 6 [ 10.681244] sd 0:0:0:0: [sda] 15109516 512-byte logical blocks: (7.74 GB/7.20 GiB) [ 10.692182] sd 0:0:0:0: [sda] Write Protect is off [ 10.697566] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 10.710124] sda: sda1 [ 10.719317] sd 0:0:0:0: [sda] Attached SCSI removable disk [ 10.751942] random: fast init done [ 14.743212] xhci_hcd 0000:01:00.0: Cannot set link state. [ 14.748699] usb usb2-port2: cannot disable (err = -32) [ 14.754068] usb 2-2: USB disconnect, device number 2 [ 21.198040] usb 2-2: new SuperSpeed USB device number 3 using xhci_hcd [ 21.237490] usb-storage 2-2:1.0: USB Mass Storage device detected [ 21.243920] scsi host0: usb-storage 2-2:1.0 [ 22.270751] scsi 0:0:0:0: Direct-Access Kingston DataTraveler 3.0 PQ: 0 ANSI: 6 [ 22.281255] sd 0:0:0:0: [sda] 15109516 512-byte logical blocks: (7.74 GB/7.20 GiB) [ 22.292173] sd 0:0:0:0: [sda] Write Protect is off [ 22.297555] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 22.309951] sda: sda1 [ 22.314312] sd 0:0:0:0: [sda] Attached SCSI removable disk [ 26.586603] xhci_hcd 0000:01:00.0: Cannot set link state. [ 26.592391] usb usb2-port2: cannot disable (err = -32) [ 26.597605] usb 2-2: USB disconnect, device number 3 [ 31.811351] usb 2-2: new SuperSpeed USB device number 4 using xhci_hcd [ 31.850819] usb-storage 2-2:1.0: USB Mass Storage device detected [ 31.857291] scsi host0: usb-storage 2-2:1.0 [ 32.884087] scsi 0:0:0:0: Direct-Access Kingston DataTraveler 3.0 PQ: 0 ANSI: 6 [ 32.893255] sd 0:0:0:0: [sda] 15109516 512-byte logical blocks: (7.74 GB/7.20 GiB) [ 32.901928] sd 0:0:0:0: [sda] Write Protect is off [ 32.907476] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 32.919278] sda: sda1 [ 32.923519] sd 0:0:0:0: [sda] Attached SCSI removable disk [ 35.979867] xhci_hcd 0000:01:00.0: Cannot set link state. [ 35.985346] usb usb2-port2: cannot disable (err = -32) [ 35.990635] usb 2-2: USB disconnect, device number 4 ************ 26bba5c767de : KERNEL PANIC AT BOOT ************ [ 1.156024] xhci_hcd 0000:01:00.0: xHCI Host Controller [ 1.161332] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1 [ 1.174358] xhci_hcd 0000:01:00.0: hcc params 0x014051cf hci version 0x100 quirks 0x00000010 [ 1.183767] hub 1-0:1.0: USB hub found [ 1.187589] hub 1-0:1.0: 4 ports detected [ 1.191883] Unable to handle kernel paging request at virtual address 82600004 [ 1.199154] pgd = c0004000 [ 1.201868] [82600004] *pgd=00000000 [ 1.205470] Internal error: Oops: 5 [#1] PREEMPT SMP ARM [ 1.210805] Modules linked in: [ 1.213876] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G C 4.11.0-rc5 #2 [ 1.221394] Hardware name: Sigma Tango DT [ 1.225419] task: df4239c0 task.stack: df430000 [ 1.229981] PC is at _raw_spin_unlock_irqrestore+0x2c/0x54 [ 1.235493] LR is at 0x8200d6c0 [ 1.238645] pc : [<c04ab9d8>] lr : [<8200d6c0>] psr: 60000110 [ 1.238645] sp : 82600000 ip : 00000000 fp : 00000000 [ 1.250181] r10: 00000000 r9 : 80000113 r8 : df4e0178 [ 1.255428] r7 : 00000000 r6 : 00000006 r5 : 000002a0 r4 : e0852460 [ 1.261985] r3 : 82600000 r2 : 00000730 r1 : 00000000 r0 : df4e0178 [ 1.268542] Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment kernel [ 1.275973] Control: 10c5387d Table: 8000404a DAC: 00000055 [ 1.281743] Process swapper/0 (pid: 1, stack limit = 0xdf430210) [ 1.287796] ---[ end trace 486a64f104b67d0c ]--- [ 1.292443] note: swapper/0[1] exited with preempt_count 1 [ 1.297966] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 1.297966] [ 1.307149] CPU1: stopping [ 1.309867] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D C 4.11.0-rc5 #2 [ 1.317384] Hardware name: Sigma Tango DT [ 1.321439] [<c010f1d0>] (unwind_backtrace) from [<c010ae0c>] (show_stack+0x10/0x14) [ 1.329233] [<c010ae0c>] (show_stack) from [<c02d874c>] (dump_stack+0x84/0x98) [ 1.336495] [<c02d874c>] (dump_stack) from [<c010dfcc>] (handle_IPI+0x168/0x17c) [ 1.343930] [<c010dfcc>] (handle_IPI) from [<c0101490>] (gic_handle_irq+0x88/0x8c) [ 1.351539] [<c0101490>] (gic_handle_irq) from [<c010b90c>] (__irq_svc+0x6c/0xa8) [ 1.359057] Exception stack(0xdf44df68 to 0xdf44dfb0) [ 1.364131] df60: 00000000 000014fc dfbe733c c0114dc0 df44c000 c0d03c70 [ 1.372351] df80: c0d03c24 c0d0d1d2 8000406a 413fc090 00000000 00000000 00000000 df44dfb8 [ 1.380569] dfa0: c01081c8 c01081cc 600e0013 ffffffff [ 1.385646] [<c010b90c>] (__irq_svc) from [<c01081cc>] (arch_cpu_idle+0x38/0x3c) [ 1.393084] [<c01081cc>] (arch_cpu_idle) from [<c04ab5c4>] (default_idle_call+0x20/0x2c) [ 1.401223] [<c04ab5c4>] (default_idle_call) from [<c01519ac>] (do_idle+0xbc/0x134) [ 1.408920] [<c01519ac>] (do_idle) from [<c0151cbc>] (cpu_startup_entry+0x18/0x1c) [ 1.416529] [<c0151cbc>] (cpu_startup_entry) from [<c010dc2c>] (secondary_start_kernel+0x160/0x16c) [ 1.425623] [<c010dc2c>] (secondary_start_kernel) from [<8010152c>] (0x8010152c) [ 1.433059] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ************ 4eebed9a6447 : I CAN PLUG/UNPLUG SEVERAL TIMES ************ [ 6.538060] usb 2-2: new SuperSpeed USB device number 2 using xhci_hcd [ 6.578314] usb-storage 2-2:1.0: USB Mass Storage device detected [ 6.584789] scsi host0: usb-storage 2-2:1.0 [ 7.604073] scsi 0:0:0:0: Direct-Access Kingston DataTraveler 3.0 PQ: 0 ANSI: 6 [ 7.615508] sd 0:0:0:0: [sda] 15109516 512-byte logical blocks: (7.74 GB/7.20 GiB) [ 7.624156] sd 0:0:0:0: [sda] Write Protect is off [ 7.629486] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 7.641705] sda: sda1 [ 7.649242] sd 0:0:0:0: [sda] Attached SCSI removable disk [ 7.687092] random: fast init done [ 11.429927] xhci_hcd 0000:01:00.0: Cannot set link state. [ 11.435405] usb usb2-port2: cannot disable (err = -32) [ 11.440606] usb 2-2: USB disconnect, device number 2 [ 17.798050] usb 2-2: new SuperSpeed USB device number 3 using xhci_hcd [ 17.838228] usb-storage 2-2:1.0: USB Mass Storage device detected [ 17.844658] scsi host0: usb-storage 2-2:1.0 [ 18.857425] scsi 0:0:0:0: Direct-Access Kingston DataTraveler 3.0 PQ: 0 ANSI: 6 [ 18.867689] sd 0:0:0:0: [sda] 15109516 512-byte logical blocks: (7.74 GB/7.20 GiB) [ 18.877440] sd 0:0:0:0: [sda] Write Protect is off [ 18.882777] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 18.894884] sda: sda1 [ 18.898988] sd 0:0:0:0: [sda] Attached SCSI removable disk [ 21.609918] xhci_hcd 0000:01:00.0: Cannot set link state. [ 21.615554] usb usb2-port2: cannot disable (err = -32) [ 21.620812] usb 2-2: USB disconnect, device number 3 [ 21.642488] udevd[957]: inotify_add_watch(6, /dev/sda, 10) failed: No such file or directory ************ d1001ab41064 : I CAN PLUG/UNPLUG SEVERAL TIMES ************ ************ a6ff6cbf1fab : KERNEL PANIC AT BOOT ************ [ 1.156209] xhci_hcd 0000:01:00.0: xHCI Host Controller [ 1.161517] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1 [ 1.174570] xhci_hcd 0000:01:00.0: hcc params 0x014051cf hci version 0x100 quirks 0x00000010 [ 1.183971] hub 1-0:1.0: USB hub found [ 1.187794] hub 1-0:1.0: 4 ports detected [ 1.192087] Unable to handle kernel paging request at virtual address 82600004 [ 1.199357] pgd = c0004000 [ 1.202072] [82600004] *pgd=00000000 [ 1.205674] Internal error: Oops: 5 [#1] PREEMPT SMP ARM [ 1.211009] Modules linked in: [ 1.214078] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G C 4.11.0-rc5 #2 [ 1.221596] Hardware name: Sigma Tango DT [ 1.225619] task: df4239c0 task.stack: df430000 [ 1.230182] PC is at _raw_spin_unlock_irqrestore+0x2c/0x54 [ 1.235693] LR is at 0x8200d6c0 [ 1.238845] pc : [<c04ab968>] lr : [<8200d6c0>] psr: 60000110 [ 1.238845] sp : 82600000 ip : 00000000 fp : 00000000 [ 1.250382] r10: 00000000 r9 : 80000113 r8 : df5d3178 [ 1.255629] r7 : 00000000 r6 : 00000006 r5 : 000002a0 r4 : e0852460 [ 1.262186] r3 : 82600000 r2 : 00000730 r1 : 00000000 r0 : df5d3178 [ 1.268744] Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment kernel [ 1.276174] Control: 10c5387d Table: 8000404a DAC: 00000055 [ 1.281945] Process swapper/0 (pid: 1, stack limit = 0xdf430210) [ 1.288000] ---[ end trace 1b343aa374b4931b ]--- [ 1.292647] note: swapper/0[1] exited with preempt_count 1 [ 1.298170] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 1.298170] [ 1.307353] CPU1: stopping [ 1.310071] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D C 4.11.0-rc5 #2 [ 1.317589] Hardware name: Sigma Tango DT [ 1.321643] [<c010f1d0>] (unwind_backtrace) from [<c010ae0c>] (show_stack+0x10/0x14) [ 1.329437] [<c010ae0c>] (show_stack) from [<c02d874c>] (dump_stack+0x84/0x98) [ 1.336700] [<c02d874c>] (dump_stack) from [<c010dfcc>] (handle_IPI+0x168/0x17c) [ 1.344134] [<c010dfcc>] (handle_IPI) from [<c0101490>] (gic_handle_irq+0x88/0x8c) [ 1.351744] [<c0101490>] (gic_handle_irq) from [<c010b90c>] (__irq_svc+0x6c/0xa8) [ 1.359263] Exception stack(0xdf44df68 to 0xdf44dfb0) [ 1.364338] df60: 00000000 00001484 dfbe733c c0114dc0 df44c000 c0d03c70 [ 1.372557] df80: c0d03c24 c0d0d1d2 8000406a 413fc090 00000000 00000000 00000000 df44dfb8 [ 1.380775] dfa0: c01081c8 c01081cc 600e0013 ffffffff [ 1.385852] [<c010b90c>] (__irq_svc) from [<c01081cc>] (arch_cpu_idle+0x38/0x3c) [ 1.393290] [<c01081cc>] (arch_cpu_idle) from [<c04ab554>] (default_idle_call+0x20/0x2c) [ 1.401427] [<c04ab554>] (default_idle_call) from [<c01519ac>] (do_idle+0xbc/0x134) [ 1.409125] [<c01519ac>] (do_idle) from [<c0151cbc>] (cpu_startup_entry+0x18/0x1c) [ 1.416733] [<c0151cbc>] (cpu_startup_entry) from [<c010dc2c>] (secondary_start_kernel+0x160/0x16c) [ 1.425826] [<c010dc2c>] (secondary_start_kernel) from [<8010152c>] (0x8010152c) [ 1.433261] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b d1001ab41064 = GOOD a6ff6cbf1fab = BAD Adding Guoqing Zhang to recipient list ************ b7f769ae1b12 : KERNEL PANIC AT BOOT ************ [ 1.159928] xhci_hcd 0000:01:00.0: xHCI Host Controller [ 1.165220] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1 [ 1.178260] xhci_hcd 0000:01:00.0: hcc params 0x014051cf hci version 0x100 quirks 0x00000010 [ 1.187646] hub 1-0:1.0: USB hub found [ 1.191466] hub 1-0:1.0: 4 ports detected [ 1.195758] Unable to handle kernel paging request at virtual address bec20004 [ 1.203028] pgd = c0004000 [ 1.205742] [bec20004] *pgd=00000000 [ 1.209345] Internal error: Oops: 5 [#1] PREEMPT SMP ARM [ 1.214680] Modules linked in: [ 1.217750] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G C 4.11.0-rc5 #2 [ 1.225268] Hardware name: Sigma Tango DT [ 1.229292] task: df4239c0 task.stack: df430000 [ 1.233855] PC is at _raw_spin_unlock_irqrestore+0x2c/0x54 [ 1.239365] LR is at 0xb6e62f31 [ 1.242518] pc : [<c04abce0>] lr : [<b6e62f31>] psr: 60000110 [ 1.242518] sp : bec20d1c ip : df4bc000 fp : 00000000 [ 1.254054] r10: 80000113 r9 : 00000001 r8 : df4bc178 [ 1.259301] r7 : 00000001 r6 : 000002a0 r5 : e0852460 r4 : df4bc178 [ 1.265858] r3 : bec20000 r2 : 00000730 r1 : 00000000 r0 : df4bc178 [ 1.272416] Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment kernel [ 1.279847] Control: 10c5387d Table: 9f6fc04a DAC: 00000055 [ 1.285617] Process swapper/0 (pid: 1, stack limit = 0xdf430210) [ 1.291673] ---[ end trace e88adba0be4326ac ]--- [ 1.296321] note: swapper/0[1] exited with preempt_count 1 [ 1.301843] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 1.301843] [ 1.311026] CPU0: stopping [ 1.313744] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G D C 4.11.0-rc5 #2 [ 1.321261] Hardware name: Sigma Tango DT [ 1.325315] [<c010f1d0>] (unwind_backtrace) from [<c010ae0c>] (show_stack+0x10/0x14) [ 1.333109] [<c010ae0c>] (show_stack) from [<c02d874c>] (dump_stack+0x84/0x98) [ 1.340371] [<c02d874c>] (dump_stack) from [<c010dfcc>] (handle_IPI+0x168/0x17c) [ 1.347805] [<c010dfcc>] (handle_IPI) from [<c0101490>] (gic_handle_irq+0x88/0x8c) [ 1.355415] [<c0101490>] (gic_handle_irq) from [<c010b90c>] (__irq_svc+0x6c/0xa8) [ 1.362933] Exception stack(0xc0d01f38 to 0xc0d01f80) [ 1.368007] 1f20: 00000000 000017ae [ 1.376227] 1f40: dfbd733c c0114dc0 c0d00000 c0d03c70 c0d03c24 c0d0d1d2 c0d24700 c0627a28 [ 1.384445] 1f60: dfffce80 00000000 00000000 c0d01f88 c01081c8 c01081cc 600e0013 ffffffff [ 1.392667] [<c010b90c>] (__irq_svc) from [<c01081cc>] (arch_cpu_idle+0x38/0x3c) [ 1.400105] [<c01081cc>] (arch_cpu_idle) from [<c04ab8cc>] (default_idle_call+0x20/0x2c) [ 1.408243] [<c04ab8cc>] (default_idle_call) from [<c01519ac>] (do_idle+0xbc/0x134) [ 1.415940] [<c01519ac>] (do_idle) from [<c0151cbc>] (cpu_startup_entry+0x18/0x1c) [ 1.423549] [<c0151cbc>] (cpu_startup_entry) from [<c04a6e64>] (rest_init+0x84/0x88) [ 1.431335] [<c04a6e64>] (rest_init) from [<c0600c70>] (start_kernel+0x37c/0x388) [ 1.438857] [<c0600c70>] (start_kernel) from [<8000807c>] (0x8000807c) [ 1.445418] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ************ fe190ed0d602 : KERNEL PANIC AT BOOT ************ [ 1.159262] xhci_hcd 0000:01:00.0: xHCI Host Controller [ 1.164570] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1 [ 1.177590] xhci_hcd 0000:01:00.0: hcc params 0x014051cf hci version 0x100 quirks 0x00000010 [ 1.186995] hub 1-0:1.0: USB hub found [ 1.190824] hub 1-0:1.0: 4 ports detected [ 1.195111] Unable to handle kernel paging request at virtual address 82600004 [ 1.202383] pgd = c0004000 [ 1.205097] [82600004] *pgd=00000000 [ 1.208696] Internal error: Oops: 5 [#1] PREEMPT SMP ARM [ 1.214030] Modules linked in: [ 1.217100] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G C 4.11.0-rc5 #2 [ 1.224618] Hardware name: Sigma Tango DT [ 1.228643] task: df4239c0 task.stack: df430000 [ 1.233205] PC is at _raw_spin_unlock_irqrestore+0x2c/0x54 [ 1.238715] LR is at 0x8200d6c0 [ 1.241867] pc : [<c04abce0>] lr : [<8200d6c0>] psr: 60000010 [ 1.241867] sp : 82600000 ip : df5ca000 fp : 00000000 [ 1.253404] r10: 80000013 r9 : 00000001 r8 : df5ca178 [ 1.258651] r7 : 00000001 r6 : 000002a0 r5 : e0852460 r4 : df5ca178 [ 1.265208] r3 : 82600000 r2 : 00000730 r1 : 00000000 r0 : df5ca178 [ 1.271766] Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment kernel [ 1.279197] Control: 10c5387d Table: 8000404a DAC: 00000055 [ 1.284967] Process swapper/0 (pid: 1, stack limit = 0xdf430210) [ 1.291025] ---[ end trace 45e34bfad7c69c2a ]--- [ 1.295671] note: swapper/0[1] exited with preempt_count 1 [ 1.301196] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 1.301196] [ 1.310379] CPU1: stopping [ 1.313097] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D C 4.11.0-rc5 #2 [ 1.320615] Hardware name: Sigma Tango DT [ 1.324668] [<c010f1d0>] (unwind_backtrace) from [<c010ae0c>] (show_stack+0x10/0x14) [ 1.332462] [<c010ae0c>] (show_stack) from [<c02d874c>] (dump_stack+0x84/0x98) [ 1.339724] [<c02d874c>] (dump_stack) from [<c010dfcc>] (handle_IPI+0x168/0x17c) [ 1.347159] [<c010dfcc>] (handle_IPI) from [<c0101490>] (gic_handle_irq+0x88/0x8c) [ 1.354769] [<c0101490>] (gic_handle_irq) from [<c010b90c>] (__irq_svc+0x6c/0xa8) [ 1.362288] Exception stack(0xdf44df68 to 0xdf44dfb0) [ 1.367362] df60: 00000000 0000143c dfbe733c c0114dc0 df44c000 c0d03c70 [ 1.375581] df80: c0d03c24 c0d0d1d2 8000406a 413fc090 00000000 00000000 00000001 df44dfb8 [ 1.383798] dfa0: c01081c8 c01081cc 600e0013 ffffffff [ 1.388876] [<c010b90c>] (__irq_svc) from [<c01081cc>] (arch_cpu_idle+0x38/0x3c) [ 1.396314] [<c01081cc>] (arch_cpu_idle) from [<c04ab8cc>] (default_idle_call+0x20/0x2c) [ 1.404453] [<c04ab8cc>] (default_idle_call) from [<c01519ac>] (do_idle+0xbc/0x134) [ 1.412150] [<c01519ac>] (do_idle) from [<c0151cbc>] (cpu_startup_entry+0x18/0x1c) [ 1.419759] [<c0151cbc>] (cpu_startup_entry) from [<c010dc2c>] (secondary_start_kernel+0x160/0x16c) [ 1.428852] [<c010dc2c>] (secondary_start_kernel) from [<8010152c>] (0x8010152c) [ 1.436287] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b *********************************** v4.12-rc1 + git revert d9f11ba9f107 : I CAN PLUG/UNPLUG SEVERAL TIMES *********************************** What next? What conclusion follows from the above? Regards.
