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From: "Andrey V. Elsukov" <bu7cher@yandex.ru>
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Cc: freebsd-bugs@freebsd.org, soralx@cydem.org, sos@freebsd.org
Subject: Re: kern/122045: [ata][panic] reiniting detached ata channel kills
	the kernel
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29.03.08, 18:50, vwe@FreeBSD.org:

> Synopsis: [ata][panic] reiniting detached ata channel kills the kernel
> State-Changed-From-To: feedback->open
> State-Changed-By: vwe
> State-Changed-When: Sat Mar 29 15:48:13 UTC 2008
> State-Changed-Why: 
> feedback received by private mail, not a problem with mounted filesystem
> system panics without active mounts on the detached drive 
> (clean umount before detach done).

ata(4) freed resources and mutexes when you are detaching it. So, you should
attach it first before reinit, because it is trying  to get access to freed
resources. Try this patch.

--
WBR, Andrey V. Elsukov
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