On Thu, 2016-01-14 at 13:50 +0100, Stefani Seibold wrote: > A unplug of an USB 1.0 OHCI controller express card will result in a > kernel crash. The express card is attached via thunderbolt and a sonnet > express card to thunderbolt adapter. The computer hangs after the > unplug, only a power fix the situation. > > This is the kernel log of a kernel 4.4 via netconsole: > > pciehp 0000:06:03.0:pcie24: Card not present on Slot(3) > pciehp 0000:06:03.0:pcie24: slot(3): Link Down event > pciehp 0000:06:03.0:pcie24: Link Down event ignored on slot(3): already powering off > ehci-pci 0000:0b:00.2: HC died; cleaning up > ehci-pci 0000:0b:00.2: remove, state 4 > usb usb5: USB disconnect, device number 1 > pciehp 0000:00:1c.4:pcie04: Card not present on Slot(4) > pciehp 0000:00:1c.4:pcie04: slot(4): Link Down event > ehci-pci 0000:0b:00.2: USB bus 5 deregistered > ohci-pci 0000:0b:00.1: HC died; cleaning up > ohci-pci 0000:0b:00.1: remove, state 4 > usb usb7: USB disconnect, device number 1 > pciehp 0000:00:1c.4:pcie04: Link Down event ignored on slot(4): already powering off > ohci-pci 0000:0b:00.1: USB bus 7 deregistered > ohci-pci 0000:0b:00.0: HC died; cleaning up > ohci-pci 0000:0b:00.0: remove, state 4 > usb usb6: USB disconnect, device number 1 > ------------[ cut here ]------------ > kernel BUG at drivers/iommu/intel-iommu.c:3592! This is likely the crucial information. The IOMMU is unhappy. > invalid opcode: 0000 [#1] PREEMPT SMP > Modules linked in: ohci_pci ohci_hcd binfmt_misc netconsole configfs bbswitch(O) iwlmvm iwlwifi vboxnetadp(O) vboxnetflt(O) vboxdrv(O) nvidia(PO) vhost_net tun vhost kvm_intel kvm irqbypass dell_smm_hwmon [last unloaded: netconsole] > CPU: 0 PID: 4857 Comm: kworker/0:3 Tainted: P O 4.4.0-gentoo #1 > Hardware name: Dell Inc. XPS 2720/05R2TK , BIOS A12 09/21/2015 > Workqueue: pciehp-3 pciehp_power_thread > task: ffff8804070a2300 ti: ffff8803e4658000 task.ti: ffff8803e4658000 > RIP: 0010:[<ffffffff8061edf4>] [<ffffffff8061edf4>] intel_unmap+0x1c4/0x1d0 > RSP: 0018:ffff8803e465bb98 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: ffff8804225fb098 RCX: 00000000ffffc000 > RDX: 0000000000000000 RSI: 00000000ffffc000 RDI: ffff8804225fb098 > RBP: ffff8803e465bbd0 R08: 0000000000000000 R09: 0000000000000000 > R10: ffff88046cc000c0 R11: 0000000000000000 R12: 00000000ffffffff > R13: 00000000ffffc000 R14: ffff880468caa400 R15: ffffe8ffffc13800 > FS: 0000000000000000(0000) GS:ffff88047f200000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f2515680324 CR3: 000000000120a000 CR4: 00000000001406f0 > Stack: > ffff8804101e4a78 ffff8803e465bbf0 ffffea000f915840 00000000ffffffff > ffffffff812a3ec0 ffff880468caa400 ffffe8ffffc13800 ffff8803e465bbf0 > ffffffff8061ee8a ffff88045e68f000 ffff8804225fb098 ffff8803e465bc28 > Call Trace: > [<ffffffff8061ee8a>] intel_free_coherent+0x5a/0xa0 > [<ffffffffa0ad4d04>] ohci_stop+0x144/0x1c0 [ohci_hcd] > [<ffffffff807e1fb4>] usb_remove_hcd+0xe4/0x1a0 > [<ffffffff807f2203>] usb_hcd_pci_remove+0x63/0x130 > [<ffffffff80573e79>] pci_device_remove+0x39/0xc0 > [<ffffffff80714f46>] __device_release_driver+0x96/0x130 > [<ffffffff80715003>] device_release_driver+0x23/0x30 > [<ffffffff8056d84a>] pci_stop_bus_device+0x8a/0xa0 > [<ffffffff8056d7f1>] pci_stop_bus_device+0x31/0xa0 > [<ffffffff8056d7f1>] pci_stop_bus_device+0x31/0xa0 > [<ffffffff8056d7f1>] pci_stop_bus_device+0x31/0xa0 > [<ffffffff8056d962>] pci_stop_and_remove_bus_device+0x12/0x20 > [<ffffffff80585f0b>] pciehp_unconfigure_device+0x9b/0x180 > [<ffffffff80585a23>] pciehp_disable_slot+0x43/0xb0 > [<ffffffff80585b1d>] pciehp_power_thread+0x8d/0xb0 It is asked to do something to a mapping for a device going away. Taking Joerg into CC. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
