lock order reversal: (sleepable after non-sleepable)
 1st 0xffffffff81e4b260 ifnet_rw (ifnet_rw) @ /usr/git/freebsd/sys/ofed/drivers/infiniband/hw/mlx4/main.c:1843
 2nd 0xffffffff81daa3f8 vlan_global (vlan_global) @ /usr/git/freebsd/sys/net/if_vlan.c:620
stack backtrace:
#0 0xffffffff80ab1620 at witness_debugger+0x70
#1 0xffffffff80ab1514 at witness_checkorder+0xe54
#2 0xffffffff80a5ad62 at _sx_xlock+0x72
#3 0xffffffff80b48a17 at vlan_trunkdev+0x37
#4 0xffffffff80d0b5cc at mlx4_ib_init_gid_table+0xfc
#5 0xffffffff80d0ac03 at mlx4_ib_inet_event+0xc3
#6 0xffffffff80bab9f0 at in_control+0xa30
#7 0xffffffff80b3c5e1 at ifioctl+0xda1
#8 0xffffffff80ab6c96 at kern_ioctl+0x246
#9 0xffffffff80ab69e1 at sys_ioctl+0x171
#10 0xffffffff80f6dbeb at amd64_syscall+0x2db
#11 0xffffffff80f4d2bb at Xfast_syscall+0xfb