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Message-ID: <5322CCC5.7020608@bitfrost.no>
Date: Fri, 14 Mar 2014 10:32:53 +0100
From: Hans Petter Selasky <hps@bitfrost.no>
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To: Rui Paulo <rpaulo@FreeBSD.org>
Subject: Re: svn commit: r262972 - head/sys/dev/usb/input
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On 03/14/14 03:15, Rui Paulo wrote:
> On 10 Mar 2014, at 01:52, Hans Petter Selasky <hselasky@freebsd.org> wrote:
>
>> Author: hselasky
>> Date: Mon Mar 10 08:52:30 2014
>> New Revision: 262972
>> URL: http://svnweb.freebsd.org/changeset/base/262972
>>
>> Log:
>>   Ignore USB keyboard driver calls from critical sections.
>>
>>   Reported by:	Oliver Pinter <oliver.pntr@gmail.com>
>>   MFC after:	1 week
>>
>> Modified:
>>   head/sys/dev/usb/input/ukbd.c
>>
>> Modified: head/sys/dev/usb/input/ukbd.c
>> ==============================================================================
>> --- head/sys/dev/usb/input/ukbd.c	Mon Mar 10 06:41:48 2014	(r262971)
>> +++ head/sys/dev/usb/input/ukbd.c	Mon Mar 10 08:52:30 2014	(r262972)
>> @@ -1909,6 +1909,12 @@ ukbd_ioctl(keyboard_t *kbd, u_long cmd,
>> 	int result;
>>
>> 	/*
>> +	 * XXX Check of someone is calling us from a critical section:
>> +	 */
>> +	if (curthread->td_critnest != 0)
>> +		return (EDEADLK);
>
> Shouldn't this panic?
>
> --
> Rui Paulo
>

Hi,

This happens on shutdown, in some special case. Not sure if panic at 
shutdown is appropriate?

--HPS