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kern/46120: audiomp: dev/bluetooth/btsco.c locking error

>Number:         46120
>Category:       kern
>Synopsis:       audiomp: dev/bluetooth/btsco.c locking error
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 01 10:45:00 +0000 2012
>Originator:     Andrew Doran
>Release:        -current
The NetBSD Project
    283 static void
    284 btsco_attach(device_t parent, device_t self, void *aux)
    298         mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE);

    435 static void
    436 btsco_sco_disconnected(void *arg, int err)
    461                 mutex_spin_enter(&sc->sc_intr_lock);

And other cases using mutex_spin_.. fastpath.  Should be mutex_enter().

Code inspection.

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