NetBSD Problem Report #37091

From  Tue Oct  9 12:54:12 2007
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Date: Tue,  9 Oct 2007 12:52:45 +0000 (UTC)
Subject: lpt driver needs to be spinlocked
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>Number:         37091
>Category:       kern
>Synopsis:       lpt driver needs to be spinlocked
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Oct 09 12:55:00 +0000 2007
>Originator:     Andrew Doran
>Release:        NetBSD 4.99.32
The NetBSD Project
lptintr can be called at very high priority (above IPL_SCHED).
Interrupts above IPL_VM should not take the kernel lock, and
interrupts above IPL_SCHED must not take the kernel lock.

Code inspection.

The lpt driver needs to be spinlocked, at least WRT to lptintr().

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