Date: Mon, 24 Mar 2008 11:28:30 -0700 From: Sam Leffler <sam@freebsd.org> To: Robert Jenssen <robertjenssen@ozemail.com.au> Cc: net@freebsd.org Subject: Re: Lock order reversal in ral driver Message-ID: <47E7F2CE.503@freebsd.org> In-Reply-To: <200803232052.07111.robertjenssen@ozemail.com.au> References: <200803232052.07111.robertjenssen@ozemail.com.au>
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Robert Jenssen wrote:
> Hi,
>
> Since upgrading to FreeBSD 7 I have been experiencing some frustrating
> problems with my RAL wifi card. In particular, it seems to me that dhclient
> fails when the ral device driver times out while scanning for my access
> point. At the same time my HP PDA with Spectec WiFi SDIO card has no problems
> finding my access point.
>
> Today I made a kernel with the following options:
>
> makeoptions DEBUG=-g
> options INVARIANTS
> options INVARIANT_SUPPORT
> options WITNESS
> options DEBUG_LOCKS
> options DEBUG_VFS_LOCKS
> options DIAGNOSTIC
> options SOCKBUF_DEBUG
> options DDB
> options KDB
>
> Upon rebooting the dmesg immediately showed a lock order reversal in the ral
> driver in ieee80211_scan.c and rt2560.c (see below). Does this correspond to
> my symptoms? Is there a wizard out there who understands what is happening?
>
<...stuff snipped...>
The LOR is unrelated to any issues you are seeing and can be safely
ignored. Try providing a description of your setup and a log that
indicates the problem. For the latter look at wlandebug(8).
Sam
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