unregister_netdevice: waiting for wg2 to become free. Usage count = 5
ref_tracker: netdev@ffff8880271e8618 has 1/1 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_hold include/linux/netdevice.h:4404 [inline]
     netdev_hold include/linux/netdevice.h:4399 [inline]
     ib_device_set_netdev drivers/infiniband/core/device.c:2253 [inline]
     ib_device_set_netdev+0x2eb/0x860 drivers/infiniband/core/device.c:2222
     rxe_register_device+0x23e/0x320 drivers/infiniband/sw/rxe/rxe_verbs.c:1552
     rxe_net_add+0x95/0xf0 drivers/infiniband/sw/rxe/rxe_net.c:537
     rxe_newlink+0x70/0x190 drivers/infiniband/sw/rxe/rxe.c:234
     nldev_newlink+0x3a6/0x680 drivers/infiniband/core/nldev.c:1797
     rdma_nl_rcv_msg+0x38a/0x6e0 drivers/infiniband/core/netlink.c:195
     rdma_nl_rcv_skb.constprop.0.isra.0+0x2d0/0x430 drivers/infiniband/core/netlink.c:239
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:727 [inline]
     __sock_sendmsg net/socket.c:742 [inline]
     ____sys_sendmsg+0xa98/0xc70 net/socket.c:2630
     ___sys_sendmsg+0x134/0x1d0 net/socket.c:2684
     __sys_sendmsg+0x16d/0x220 net/socket.c:2716
     do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
     __do_fast_syscall_32+0x7c/0x300 arch/x86/entry/syscall_32.c:306
     do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
     entry_SYSENTER_compat_after_hwframe+0x84/0x8e