[Trac #849] touchpad driver on pre-b2 w/ experimental kernels spits up mutex backtrace

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#849: touchpad driver on pre-b2 w/ experimental kernels spits up mutex backtrace
----------------------+-----------------------------------------------------
 Reporter:  dilinger  |       Owner:  dilinger 
     Type:  defect    |      Status:  new      
 Priority:  normal    |   Milestone:  Untriaged
Component:  kernel    |    Keywords:           
----------------------+-----------------------------------------------------
 From the latest experimental kernel(s), circa 20070129:
 {{{

 [  289.601458] Scheduling mode switch to PT.
 [  289.625197] BUG: spinlock bad magic on CPU#0, kpsmoused/407
 [  289.652029]  lock: c70bdd30, .magic: 00000000, .owner: <none>/-1,
 .owner_cpu0
 [  289.681748]  [<c04d21cb>] _raw_spin_lock+0x1c/0xd2
 [  289.708259]  [<c05af4d7>] __mutex_lock_slowpath+0x17/0x77
 [  289.735771]  [<c05af3f0>] mutex_lock+0x20/0x23
 [  289.762593]  [<c05472db>] ps2_command+0x82/0x31b
 [  289.790102]  [<c0401c2b>] __switch_to+0x19/0x143
 [  289.817704]  [<c80794c7>] olpc_mode_switch+0x65/0xb6 [psmouse]
 [  289.847624]  [<c041ab47>] <4>Scheduling mode switch to PT.
 [  289.877080] run_workqueue+0x84/0x124
 [  289.903954]  [<c05b00e5>] _spin_lock_irqsave+0x18/0x1d
 [  289.931486]  [<c8079462>] olpc_mode_switch+0x0/0xb6 [psmouse]
 [  289.961876]  [<c041b143>] worker_thread+0x105/0x12e
 [  289.991015]  [<c040afcb>] default_wake_function+0x0/0xc
 [  290.020445]  [<c041b03e>] worker_thread+0x0/0x12e
 [  290.049964]  [<c041d588>] kthread+0xa0/0xc8
 [  290.078794]  [<c041d4e8>] kthread+0x0/0xc8
 [  290.107715]  [<c040302f>] kernel_thread_helper+0x7/0x10
 [  290.137339]  =======================
 [  300.160437] BUG: soft lockup detected on CPU#0!
 [  300.191513]  [<c042b3fd>] softlockup_tick+0x91/0xa4
 [  300.224176]  [<c0415321>] update_process_times+0x3b/0x5e
 }}}

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Ticket URL: <http://dev.laptop.org/ticket/849>
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