Description of problem:
kernel panics when start network on a 82598 ixgbe interface.

Version-Release number of selected component (if applicable):
2.6.32-114.0.1.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1. install RHEL6.1-20110217.n.0 or install RHEL6, and update kernel to 2.6.32-114.0.1.el6.
2.
3.
  
Actual results:
kernel panics.

Expected results:
works as normal.

Additional info:
trace log:

Bringing up interface eth0:  
Determining IP information for eth0...ADDRCONF(NETDEV_UP): eth0: link is not ready
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<(null)>] (null)
PGD 0 
Oops: 0010 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/net/eth0/address
CPU 12 
Modules linked in: ipv6 dm_mirror dm_region_hash dm_log power_meter hwmon sr_mod cdrom ghes hed i2c_i801 i2c_core iTCO_wdt iTCO_vendor_support ioatdma i7core_edac edac_core ixgbe dca mdio sg ext4 mbcache jbd2 sd_mod crc_t10dif usb_storage mptsas mptscsih mptbase scsi_transport_sas dm_mod [last unloaded: microcode]

Modules linked in: ipv6 dm_mirror dm_region_hash dm_log power_meter hwmon sr_mod cdrom ghes hed i2c_i801 i2c_core iTCO_wdt iTCO_vendor_support ioatdma i7core_edac edac_core ixgbe dca mdio sg ext4 mbcache jbd2 sd_mod crc_t10dif usb_storage mptsas mptscsih mptbase scsi_transport_sas dm_mod [last unloaded: microcode]
Pid: 79, comm: events/12 Not tainted 2.6.32-114.0.1.el6.x86_64 #1 N20-B6620-1
RIP: 0010:[<0000000000000000>]  [<(null)>] (null)
RSP: 0018:ffff8801e84abe08  EFLAGS: 00010202
RAX: 00000000fffffffd RBX: ffff8801e70b9f08 RCX: 000000000000b4e6
RDX: ffff8801e84abdef RSI: 0000000000000000 RDI: ffff8801e70b9400
RBP: ffff8801e84abe30 R08: ffff8801e84aa000 R09: 0000000000000001
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff8801e70b86c0
R13: ffff8801e70b9400 R14: ffff8801e84abfd8 R15: ffff8800282d8c88
FS:  0000000000000000(0000) GS:ffff8800282c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 0000000001a25000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process events/12 (pid: 79, threadinfo ffff8801e84aa000, task ffff8801e84a9500)
Stack:
 ffffffffa0143628 ffff8800282d8c80 ffff8800282d8c80 ffff8800282d8c80
<0> ffffffffa01435d0 ffff8801e84abee0 ffffffff810880e0 0000000000000000
<0> 0000000000000000 ffff8801e84abe60 ffff8801e84a9b78 ffff8801e84a9500
Call Trace:
 [<ffffffffa0143628>] ? ixgbe_sfp_config_module_task+0x58/0x110 [ixgbe]
 [<ffffffffa01435d0>] ? ixgbe_sfp_config_module_task+0x0/0x110 [ixgbe]
 [<ffffffff810880e0>] worker_thread+0x170/0x2a0
 [<ffffffff8108d7e0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff81087f70>] ? worker_thread+0x0/0x2a0
 [<ffffffff8108d476>] kthread+0x96/0xa0
 [<ffffffff8100c1ca>] child_rip+0xa/0x20
 [<ffffffff8108d3e0>] ? kthread+0x0/0xa0
 [<ffffffff8100c1c0>] ? child_rip+0x0/0x20
Code:  Bad RIP value.
RIP  [<(null)>] (null)
 RSP <ffff8801e84abe08>
CR2: 0000000000000000
---[ end trace 1d2c66763d287735 ]---
Kernel panic - not syncing: Fatal exception
Pid: 79, comm: events/12 Tainted: G      D    ----------------  2.6.32-114.0.1.el6.x86_64 #1
Call Trace:
 [<ffffffff814d6a5b>] ? panic+0x78/0x141
 [<ffffffff814daaa4>] ? oops_end+0xe4/0x100
 [<ffffffff81040a8b>] ? no_context+0xfb/0x260
 [<ffffffff81040d15>] ? __bad_area_nosemaphore+0x125/0x1e0
 [<ffffffff81040de3>] ? bad_area_nosemaphore+0x13/0x20
 [<ffffffff8104149d>] ? __do_page_fault+0x31d/0x480
 [<ffffffff810096e0>] ? __switch_to+0xd0/0x320
 [<ffffffff814d7166>] ? thread_return+0x4e/0x778
 [<ffffffff81050068>] ? update_curr+0xf8/0x1e0
 [<ffffffff8107904c>] ? lock_timer_base+0x3c/0x70
 [<ffffffff81079afb>] ? try_to_del_timer_sync+0x7b/0xe0
 [<ffffffff814dca6e>] ? do_page_fault+0x3e/0xa0
 [<ffffffff814d9e15>] ? page_fault+0x25/0x30
 [<ffffffffa0143628>] ? ixgbe_sfp_config_module_task+0x58/0x110 [ixgbe]
 [<ffffffffa01435d0>] ? ixgbe_sfp_config_module_task+0x0/0x110 [ixgbe]
 [<ffffffff810880e0>] ? worker_thread+0x170/0x2a0
 [<ffffffff8108d7e0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff81087f70>] ? worker_thread+0x0/0x2a0
 [<ffffffff8108d476>] ? kthread+0x96/0xa0
 [<ffffffff8100c1ca>] ? child_rip+0xa/0x20
 [<ffffffff8108d3e0>] ? kthread+0x0/0xa0
 [<ffffffff8100c1c0>] ? child_rip+0x0/0x20