On Mon, 2015-11-16 at 12:30 -0500, Ilia Mirkin wrote: > Task dump for CPU 2: > kworker/2:2 R running task 13152 23226 2 0x00000000 > Workqueue: usb_hub_wq hub_event > ffff88017fd3ba08 ffff88017fd3b9c8 ffffffff8111dfc8 0000000000000002 > ffff88017fd3ba08 ffff88017fd3b9e0 ffffffff8111fd39 0000000000000002 > ffff88017fd3ba30 ffffffff81146727 ffff880100000000 ffff880225e62580 > Call Trace: > [<ffffffff8111dfc8>] sched_show_task+0xc8/0x130 > [<ffffffff8111fd39>] dump_cpu_task+0x39/0x40 > [<ffffffff81146727>] synchronize_sched_expedited_wait.constprop.64 > +0x1f7/0x220 > [<ffffffff8112d420>] ? wait_woken+0x80/0x80 > [<ffffffff81146945>] synchronize_sched_expedited+0x1f5/0x2e0 > [<ffffffff81146a3e>] synchronize_rcu_expedited+0xe/0x10 > [<ffffffff811c8eaf>] bdi_unregister+0x4f/0x100 > [<ffffffff813a6fff>] blk_cleanup_queue+0xef/0x120 > [<ffffffff815c79b4>] __scsi_remove_device+0x54/0xd0 > [<ffffffff815c6060>] scsi_forget_host+0x60/0x70 > [<ffffffff815bb947>] scsi_remove_host+0x77/0x110 Hi, this looks like the SCSI layer is involved at that point. Could you repost with a CC to linux-scsi? Regards Oliver > [<ffffffff81661629>] usb_stor_disconnect+0x59/0xc0 > [<ffffffff8162c723>] usb_unbind_interface+0x83/0x270 > [<ffffffff8159a8e6>] __device_release_driver+0x96/0x130 > [<ffffffff8159a9a3>] device_release_driver+0x23/0x30 > [<ffffffff81599a88>] bus_remove_device+0xf8/0x140 > [<ffffffff81596499>] device_del+0x139/0x270 > [<ffffffff81630c1f>] ? usb_remove_ep_devs+0x1f/0x30 > [<ffffffff8162a270>] usb_disable_device+0xa0/0x1f0 > [<ffffffff81621767>] usb_disconnect+0x87/0x230 > [<ffffffff8162196a>] hub_quiesce+0x5a/0xb0 > [<ffffffff8162310f>] hub_event+0x33f/0x1180 > [<ffffffff81127731>] ? pick_next_task_fair+0xa1/0x970 > [<ffffffff8110dd2c>] process_one_work+0x14c/0x3d0 > [<ffffffff8110e2cb>] worker_thread+0x4b/0x440 > [<ffffffff818b9f15>] ? __schedule+0x335/0x8e0 > [<ffffffff8110e280>] ? rescuer_thread+0x2d0/0x2d0 > [<ffffffff8110e280>] ? rescuer_thread+0x2d0/0x2d0 > [<ffffffff81112e39>] kthread+0xc9/0xe0 > [<ffffffff81112d70>] ? kthread_park+0x60/0x60 > [<ffffffff818be1af>] ret_from_fork+0x3f/0x70 > [<ffffffff81112d70>] ? kthread_park+0x60/0x60 -- Oliver Neukum <oneukum@xxxxxxxx> -- 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
