2.6.20 -- BUG: bad unlock balance detected! (tifm_7xx1)

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I got the following when I pulled my smartcard out of my laptop.

=====================================
[ BUG: bad unlock balance detected! ]
-------------------------------------
tifm/0/898 is trying to release lock (&fm->lock) at:
[<f9185933>] tifm_7xx1_switch_media+0x2e9/0x326 [tifm_7xx1]
but there are no more locks to release!

other info that might help us debug this:
no locks held by tifm/0/898.

stack backtrace:
[<c04051c9>] show_trace_log_lvl+0x1a/0x2f
[<c040576e>] show_trace+0x12/0x14
[<c04057f2>] dump_stack+0x16/0x18
[<c043da19>] print_unlock_inbalance_bug+0xec/0xf9
[<c043f99b>] lock_release+0x9d/0x159
[<c060ff30>] _spin_unlock_irqrestore+0x19/0x3c
[<f9185933>] tifm_7xx1_switch_media+0x2e9/0x326 [tifm_7xx1]
[<c0438787>] kthread+0xb3/0xdc
[<c0404cb3>] kernel_thread_helper+0x7/0x10
=======================
tifm_7xx1: sd card detected in socket 3

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