System crashes when FCoE controller is reset .

Issue

• System crashed with following panic message

BUG: unable to handle kernel paging request at 000060eec8e2f500
IP: [<ffffffff8154bf4b>] _spin_lock_bh+0x1b/0x40
PGD 0 
Oops: 0002 [#1] SMP 
last sysfs file: /sys/devices/system/cpu/online
CPU 7 
..
Pid: 853, comm: bnx2fc_l2_threa Tainted: P        W  -- ------------    2.6.32-642.4.2.el6.x86_64 #1 HP ProLiant BL460c Gen9
RIP: 0010:[<ffffffff8154bf4b>]  [<ffffffff8154bf4b>] _spin_lock_bh+0x1b/0x40
,,
Process bnx2fc_l2_threa (pid: 853, threadinfo ffff882064f30000, task ffff882065642040)
Stack:
..
Call Trace:
 [<ffffffffa0039abd>] fc_exch_find+0x5d/0xa0 [libfc]
 [<ffffffffa003bf71>] fc_exch_recv+0x5d1/0xe80 [libfc]
 [<ffffffff81549e2e>] ? mutex_lock+0x1e/0x50
 [<ffffffffa04280eb>] bnx2fc_l2_rcv_thread+0x37b/0x3f0 [bnx2fc]
 [<ffffffffa0427d70>] ? bnx2fc_l2_rcv_thread+0x0/0x3f0 [bnx2fc]
 [<ffffffff810a640e>] kthread+0x9e/0xc0
 [<ffffffff8100c28a>] child_rip+0xa/0x20
 [<ffffffff810a6370>] ? kthread+0x0/0xc0
 [<ffffffff8100c280>] ? child_rip+0x0/0x20