Soft lockup occured with the hald-addon-stor process in the IDE layer

Dec 18 10:57:11 hostname kernel: BUG: soft lockup - CPU#2 stuck for 10s! [hald-addon-stor:2486]
Dec 18 10:57:11 hostname kernel: 
Dec 18 10:57:11 hostname kernel: Pid: 2486, comm:      hald-addon-stor
Dec 18 10:57:11 hostname kernel: EIP: 0060:[<c0618010>] CPU: 2
Dec 18 10:57:11 hostname kernel: EIP is at _spin_unlock_irqrestore+0x8/0x9
Dec 18 10:57:11 hostname kernel:  EFLAGS: 00000282    Not tainted  (2.6.18-164.el5 #1)
Dec 18 10:57:11 hostname kernel: EAX: c06faa00 EBX: e4a28730 ECX: 00000282 EDX: 00000200
Dec 18 10:57:11 hostname kernel: ESI: c07e3014 EDI: 00000001 EBP: 00000000 DS: 007b ES: 007b
Dec 18 10:57:11 hostname kernel: CR0: 8005003b CR2: 00774afc CR3: 01a9b000 CR4: 000006d0
Dec 18 10:57:11 hostname kernel:  [<c056d414>] ide_end_request+0xcc/0xd4
Dec 18 10:57:11 hostname kernel:  [<c056d435>] ide_kill_rq+0x19/0x29
Dec 18 10:57:11 hostname kernel:  [<c056daa9>] ide_do_request+0x664/0x6bf
Dec 18 10:57:11 hostname kernel:  [<c042c101>] lock_timer_base+0x15/0x2f
Dec 18 10:57:11 hostname kernel:  [<c042c101>] lock_timer_base+0x15/0x2f
Dec 18 10:57:11 hostname kernel:  [<c042c5bc>] del_timer+0x41/0x47
Dec 18 10:57:11 hostname kernel:  [<c04dc096>] elv_insert+0x85/0x160
Dec 18 10:57:11 hostname kernel:  [<c04deaba>] blk_execute_rq_nowait+0x6d/0x84
Dec 18 10:57:11 hostname kernel:  [<c04deb47>] blk_execute_rq+0x76/0x97
Dec 18 10:57:11 hostname kernel:  [<c04de208>] blk_end_sync_rq+0x0/0x1d
Dec 18 10:57:11 hostname kernel:  [<c0459d5c>] mempool_alloc+0x28/0xc9
Dec 18 10:57:11 hostname kernel:  [<c04e2281>] sg_io+0x270/0x355
Dec 18 10:57:11 hostname kernel:  [<c04e27b0>] scsi_cmd_ioctl+0x1b9/0x365
Dec 18 10:57:11 hostname kernel:  [<f89f3ca3>] cdrom_ioctl+0x22/0xb30 [cdrom]
Dec 18 10:57:11 hostname kernel:  [<f89e5f82>] idecd_ioctl+0x12f/0x144 [ide_cd]
Dec 18 10:57:11 hostname kernel:  [<c041c9f6>] __wake_up_common+0x2f/0x53
Dec 18 10:57:11 hostname kernel:  [<c041ca2b>] __wake_up_locked+0x11/0x15
Dec 18 10:57:11 Server01 kernel:  [<c0617eb6>] __down+0x85/0xbb
Dec 18 10:57:11 hostname kernel:  [<c04e074f>] blkdev_driver_ioctl+0x4b/0x5b
Dec 18 10:57:11 hostname kernel:  [<c04e0d76>] blkdev_ioctl+0x617/0x665
Dec 18 10:57:11 hostname kernel:  [<c048ce9a>] mntput_no_expire+0x11/0x6a
Dec 18 10:57:11 hostname kernel:  [<c04e9f76>] kobject_get+0xf/0x13
Dec 18 10:57:11 hostname kernel:  [<c04e12b9>] get_disk+0x35/0x6e
Dec 18 10:57:11 hostname kernel:  [<c04e12f9>] exact_lock+0x7/0xd
Dec 18 10:57:11 hostname kernel:  [<c055a9dd>] kobj_lookup+0x10d/0x168
Dec 18 10:57:11 hostname kernel:  [<f89e6042>] idecd_open+0x7b/0xa8 [ide_cd]
Dec 18 10:57:11 hostname kernel:  [<c047b505>] do_open+0x211/0x2cc
Dec 18 10:57:11 hostname kernel:  [<c047aa5c>] bd_claim+0x10/0x59
Dec 18 10:57:11 hostname kernel:  [<c047b75d>] blkdev_open+0x31/0x44
Dec 18 10:57:11 hostname kernel:  [<c047290e>] __dentry_open+0xea/0x1ab
Dec 18 10:57:11 hostname kernel:  [<c047ac81>] block_ioctl+0x13/0x16
Dec 18 10:57:11 hostname kernel:  [<c047ac6e>] block_ioctl+0x0/0x16
Dec 18 10:57:11 hostname kernel:  [<c0484239>] do_ioctl+0x1c/0x5d
Dec 18 10:57:11 hostname kernel:  [<c04847cd>] vfs_ioctl+0x47b/0x4d3
Dec 18 10:57:11 hostname kernel:  [<c044a5ce>] audit_syscall_entry+0x15a/0x18c
Dec 18 10:57:11 hostname kernel:  [<c048486d>] sys_ioctl+0x48/0x5f
Dec 18 10:57:11 hostname kernel:  [<c0404f17>] syscall_call+0x7/0xb