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Date: Mon, 09 Mar 2009 23:41:10 +0200
From: Alexander Motin <mav@FreeBSD.org>
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To: pluknet <pluknet@gmail.com>
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Cc: FreeBSD-Current <freebsd-current@freebsd.org>
Subject: Re: Unable to set devclass (devname: (null)
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pluknet wrote:
> Is it ok (and how much harmfull) to see this message?
> 
> driver bug: Unable to set devclass (devname: (null))
> 
> P.S.
> This is introduced in subr_bus.c, v1.216
> -					PDEBUG(("Unable to set device class"));
> +					printf("driver bug: Unable to set devclass (devname: %s)\n",
> +					    (child ? device_get_name(child) :
> +						"no device"));
> 
> where PDEBUG was moved from BUS_DEBUG to general output.

Actually this check was introduced in rev. 1.214, just was not logged. 
Before this change system could crash soon after this message. Now it 
should not, but related device probably will not work properly. It is 
probably not good and should be fixed, but it can be just a low memory 
symptom. It was noticed for ata driver, but I hope it was fixed. Where 
have you get it?

-- 
Alexander Motin