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Date: Wed, 3 Jan 2001 12:04:18 +1100 (EST)
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Subject: kern/24032: pccard & rndcontrol
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>Number:         24032
>Category:       kern
>Synopsis:       rndcontrol and pccardd use of interupt handler incompatable
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 02 17:10:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Mark Andrews
>Release:        FreeBSD 4.2-RELEASE i386
>Organization:
Nominum
>Environment:

FreeBSD drugs.dv.isc.org 4.2-RELEASE FreeBSD 4.2-RELEASE #0: Fri Nov 24 00:33:35 EST 2000     marka@drugs.dv.isc.org:/usr/obj/usr/src/sys/DRUGS  i386

>Description:

	rndcontrol and pccard use of the interupt handler is incompatable
	with each other.  It is possible to remove the interupt handler
	of a installed card via rndcontrol -c irq.

	Inserting a card clears the interupt handler installed via
	rndcontrol without clearing the associated bit in the mask.

>How-To-Repeat:

	rndcontrol -s <irq>
	insert card that wil use <irq>
	rndcontrol -c <irg>
	

>Fix:

	Minimum fix, rndcontrol -c should ensure that it is still the
	installed handler before trying to restore the handler saved
	via rndcontrol -s.

	A full fix would require two interupt handling tables one
	for rndcontrol to manipulate and for the devices to manipulate
	The handlers in the later called from the handlers in the
	former.

	There are other alternatives which require the code intalling
	the interupt handlers to know about add_interrupt_randomness
	and do the appopriate things.

>Release-Note:
>Audit-Trail:
>Unformatted:


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