netdev - Re: REGRESSION for RT2561/RT61 in 2.6.33

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Message-ID: <Pine.LNX.4.44L0.1001111045240.2873-100000@iolanthe.rowland.org>
Date:	Mon, 11 Jan 2010 10:46:46 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Johannes Berg <johannes@...solutions.net>
cc:	Gertjan van Wingerde <gwingerde@...il.com>,
	<linux-wireless@...r.kernel.org>, <netdev@...r.kernel.org>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: REGRESSION for RT2561/RT61 in 2.6.33

On Mon, 11 Jan 2010, Johannes Berg wrote:

> Alan,
> 
> > The card doesn't work.  Although the firmware load appears to
> > succeed, "iwconfig wlan0" says no wireless extensions present.
> 
> You need to set CONFIG_CFG80211_WEXT (it is default y).
> 
> > The only clue I can offer is that "rmmod rt61pci" hangs in 
> > wiphy_unregister() during the wait_event() loop near the start,
> > because 
> > rdev->opencount is equal to -1.  This suggests a refcounting imbalance
> > 
> > of some sort.
> 
> Good point, that's a bug that will go away with CONFIG_CFG80211_WEXT,
> I'll send a fix.

Many thanks.  I'll test the patch and the config option tonight and
report back tomorrow.

Alan Stern

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