NDIS panic: _mtx_lock_sleep: recursed on non-recursive mutex

[Doug Barton]

I'm getting the following panic with the latest -current as soon as the 
ndis module loads in response to an 'ifconfig ndis0 up' command:

panic: _mtx_lock_sleep: recursed on non-recursive mutex ndis softc lock @ 
/usr/local/src/sys/modules/ndis/../../compat/ndis/kern_ndis.c:1463

Doug

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