netdev - Re: [Rt2400-devel] [BUG] rt2x00: inconsistent lock state

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Message-Id: <200708052246.43203.IvDoorn@gmail.com>
Date:	Sun, 5 Aug 2007 22:46:43 +0200
From:	Ivo van Doorn <ivdoorn@...il.com>
To:	rt2400-devel@...ts.sourceforge.net
Cc:	Luca Tettamanti <kronos.it@...il.com>, netdev@...r.kernel.org,
	linux-wireless@...r.kernel.org
Subject: Re: [Rt2400-devel] [BUG] rt2x00: inconsistent lock state

Hi,

> If I'm reading the state bits and the message correcly dev_base_lock was
> aquired for write with IRQ enabled (via register_netdevice), but lockep also
> saw it aquired for read *in* IRQ (hardirq) context (rt2x00 code path, via
> rt2x00lib_beacondone -> ieee80211_beacon_get); this means that a deadlock can
> occur if we take an interrupt while the lock is already held.
> So either the lock must be IRQ-safe (_irq() / _irq_save()) or rt2x00 must not
> take it in interrupt context.

This has already been fixed in rt2x00.git
I am still working on resolving some other issues,
but the rt2x00 2.0.7 release will contain the fix for this.

Ivo
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