NetBSD Problem Report #37091
From martin@duskware.de Tue Oct 9 12:54:12 2007
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Date: Tue, 9 Oct 2007 12:52:45 +0000 (UTC)
From: ad@netbsd.org
Reply-To: ad@netbsd.org
To: netbsd-bugs-owner@NetBSD.org
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
>Organization:
The NetBSD Project
>Environment:
N/A
>Description:
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.
>How-To-Repeat:
Code inspection.
>Fix:
The lpt driver needs to be spinlocked, at least WRT to lptintr().
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