From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org
Subject: [Bug 178581] New: v4.9-rc1: Deadlock while unloading IPoIB
Date: Wed, 19 Oct 2016 20:31:33 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=178581
Bug ID: 178581
Summary: v4.9-rc1: Deadlock while unloading IPoIB
Product: Drivers
Version: 2.5
Kernel Version: v4.9-rc1
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Infiniband/RDMA
Assignee: drivers_infiniband-rdma-ztI5WcYan/vQLgFONoPN62D2FQJk+8+b@public.gmane.org
Reporter: bvanassche-HInyCGIudOg@public.gmane.org
Regression: No
Created attachment 241991
--> https://bugzilla.kernel.org/attachment.cgi?id=241991&action=edit
Lockdep output
The output produced by lockdep has been attached. Call trace from that
attachment:
Call Trace:
[] dump_stack+0x68/0x93
[] print_circular_bug+0x1be/0x210
[] __lock_acquire+0x10fc/0x1270
[] lock_acquire+0xe9/0x1d0
[] __kernfs_remove+0x24a/0x310
[] kernfs_remove+0x1e/0x30
[] sysfs_remove_dir+0x4c/0x80
[] kobject_del+0x18/0x50
[] device_del+0x190/0x240
[] netdev_unregister_kobject+0x57/0x60
[] rollback_registered_many+0x220/0x370
[] rollback_registered+0x2c/0x40
[] unregister_netdevice_queue+0x44/0x90
[] unregister_netdev+0x17/0x20
[] ipoib_remove_one+0x97/0xe0 [ib_ipoib]
[] ib_unregister_device+0xa9/0x150 [ib_core]
[] mlx4_ib_remove+0x65/0x250 [mlx4_ib]
[] mlx4_remove_device+0x6e/0x80 [mlx4_core]
[] mlx4_unregister_device+0x48/0x90 [mlx4_core]
[] mlx4_unload_one+0x7d/0x310 [mlx4_core]
[] mlx4_shutdown+0x5d/0x70 [mlx4_core]
[] pci_device_shutdown+0x28/0x60
[] device_shutdown+0xd0/0x1d0
[] kernel_restart_prepare+0x31/0x40
[] kernel_restart+0xd/0x50
[] SYSC_reboot+0xf9/0x1e0
[] SyS_reboot+0x9/0x10
[] entry_SYSCALL_64_fastpath+0x18/0xad
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