The same problem persists with kernel 3.4.0-030400-generic from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-precise/ (which is the latest precise kernel in that PPA).

Bits of dmesg that mention cciss:

    [    1.679701] HP CISS Driver (v 3.6.26)
    [    1.681001] cciss 0000:06:01.0: PCI IRQ 41 -> rerouted to legacy IRQ 17
    [    1.681807] cciss 0000:06:01.0: Controller reports max supported commands of 0, an obvious lie. Using 16.  Ensure that firmware is up to date.
    [    1.800107] cciss 0000:06:01.0: cciss0: <0x3220> at PCI 0000:06:01.0 IRQ 17 using DAC

Hung task messages:

    [  241.260240] INFO: task modprobe:342 blocked for more than 120 seconds.
    [  241.266958] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [  241.273594] modprobe        D 0000000000000001     0   342    164 0x00000004
    [  241.280148]  ffff88007af93ad8 0000000000000086 ffff88007af93fd8 00000000000137c0
    [  241.286979]  ffff88007af92010 00000000000137c0 00000000000137c0 00000000000137c0
    [  241.293974]  ffff88007af93fd8 00000000000137c0 ffff880037718000 ffff88003782adc0
    [  241.293978] Call Trace:
    [  241.293989]  [<ffffffff8166ba29>] schedule+0x29/0x70
    [  241.293993]  [<ffffffff81669c7d>] schedule_timeout+0x1fd/0x2e0
    [  241.293999]  [<ffffffff810825aa>] ? task_rq_lock+0x5a/0xb0
    [  241.294003]  [<ffffffff8103ff59>] ? default_spin_lock_flags+0x9/0x10
    [  241.294006]  [<ffffffff8166b87b>] wait_for_common+0xdb/0x180
    [  241.294009]  [<ffffffff81086e20>] ? try_to_wake_up+0x2d0/0x2d0
    [  241.294013]  [<ffffffff81347170>] ? pci_bus_match+0x30/0x30
    [  241.294016]  [<ffffffff8166b9fd>] wait_for_completion+0x1d/0x20
    [  241.294021]  [<ffffffff8106e8ee>] work_on_cpu+0xce/0xf0
    [  241.294023]  [<ffffffff81347170>] ? pci_bus_match+0x30/0x30
    [  241.294027]  [<ffffffff813472ef>] __pci_device_probe+0xaf/0xf0
    [  241.294031]  [<ffffffff8140b299>] ? get_device+0x19/0x20
    [  241.294034]  [<ffffffff8134853a>] pci_device_probe+0x3a/0x60
    [  241.294038]  [<ffffffff8140f2a8>] really_probe+0x68/0x200
    [  241.294041]  [<ffffffff8140f485>] driver_probe_device+0x45/0x70
    [  241.294044]  [<ffffffff8140f54b>] __driver_attach+0x9b/0xa0
    [  241.294047]  [<ffffffff8140f4b0>] ? driver_probe_device+0x70/0x70
    [  241.294050]  [<ffffffff8140d7c8>] bus_for_each_dev+0x68/0x90
    [  241.294053]  [<ffffffff8140f0ee>] driver_attach+0x1e/0x20
    [  241.294056]  [<ffffffff8140ea20>] bus_add_driver+0xd0/0x270
    [  241.294060]  [<ffffffffa0051000>] ? 0xffffffffa0050fff
    [  241.294062]  [<ffffffffa0051000>] ? 0xffffffffa0050fff
    [  241.294065]  [<ffffffff8140fbf0>] driver_register+0x80/0x150
    [  241.294068]  [<ffffffffa0051000>] ? 0xffffffffa0050fff
    [  241.294070]  [<ffffffff813487c6>] __pci_register_driver+0x56/0xd0
    [  241.294078]  [<ffffffffa0051088>] cciss_init+0x88/0x1000 [cciss]
    [  241.294082]  [<ffffffff81002042>] do_one_initcall+0x42/0x180
    [  241.294087]  [<ffffffff810b655c>] sys_init_module+0xcc/0x220
    [  241.294091]  [<ffffffff81674e69>] system_call_fastpath+0x16/0x1b
    [  241.294094] INFO: task work_for_cpu:358 blocked for more than 120 seconds.
    [  241.294095] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [  241.294097] work_for_cpu    D ffffffff8180cb40     0   358      2 0x00000000
    [  241.294100]  ffff88003775bbe0 0000000000000046 ffff88003775bfd8 00000000000137c0
    [  241.294104]  ffff88003775a010 00000000000137c0 00000000000137c0 00000000000137c0
    [  241.294106]  ffff88003775bfd8 00000000000137c0 ffffffff81c13020 ffff88003766db80
    [  241.294109] Call Trace:
    [  241.294113]  [<ffffffff8166ba29>] schedule+0x29/0x70
    [  241.294115]  [<ffffffff81669c7d>] schedule_timeout+0x1fd/0x2e0
    [  241.294119]  [<ffffffff8112982f>] ? __alloc_pages_nodemask+0x12f/0x240
    [  241.294122]  [<ffffffff8166b87b>] wait_for_common+0xdb/0x180
    [  241.294125]  [<ffffffff81086e20>] ? try_to_wake_up+0x2d0/0x2d0
    [  241.294127]  [<ffffffff8166b9fd>] wait_for_completion+0x1d/0x20
    [  241.294133]  [<ffffffffa007e187>] sendcmd_withirq_core+0xb7/0x1e0 [cciss]
    [  241.294138]  [<ffffffffa0080b50>] sendcmd_withirq+0xb0/0xc0 [cciss]
    [  241.294143]  [<ffffffffa0085cce>] cciss_init_one+0x698/0x7e4 [cciss]
    [  241.294146]  [<ffffffff8103ff59>] ? default_spin_lock_flags+0x9/0x10
    [  241.294148]  [<ffffffff813471cf>] local_pci_probe+0x5f/0xd0
    [  241.294152]  [<ffffffff8106e0f0>] ? cwq_dec_nr_in_flight+0xa0/0xa0
    [  241.294155]  [<ffffffff8106e108>] do_work_for_cpu+0x18/0x30
    [  241.294158]  [<ffffffff810763ee>] kthread+0x9e/0xb0
    [  241.294161]  [<ffffffff81676164>] kernel_thread_helper+0x4/0x10
    [  241.294164]  [<ffffffff81076350>] ? kthread_freezable_should_stop+0x70/0x70
    [  241.294166]  [<ffffffff81676160>] ? gs_change+0x13/0x13