linux-kernel - Re: [PATCH] IRQ handling race and spurious IIR read in serial/8250.c

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Message-ID: <20090312180955.1f52a401@lxorguk.ukuu.org.uk>
Date:	Thu, 12 Mar 2009 18:09:55 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Markus Armbruster <armbru@...hat.com>
Cc:	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
	"xen-devel\@lists.xensource.com" <xen-devel@...ts.xensource.com>,
	Ian Jackson <Ian.Jackson@...citrix.com>,
	Anders Kaseorg <andersk@....EDU>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] IRQ handling race and spurious IIR read in
 serial/8250.c

> Ian Jackson recently debugged a problem reported by Anders Kaseorg, and
> posted a fix (see http://lkml.org/lkml/2009/2/11/240).  As far as I can
> see, the patch has been dropped on the floor.

It was proposed as a band aid fix not a real fix. The real fix involves
finishing sorting out any locking issues Ian identified. I've not seen a
patch for that yet.
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