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[Xen-devel] Re: [PATCH] IRQ handling race and spurious IIR read in seria

To: Markus Armbruster <armbru@xxxxxxxxxx>
Subject: [Xen-devel] Re: [PATCH] IRQ handling race and spurious IIR read in serial/8250.c
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 12 Mar 2009 18:09:55 +0000
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Ian, Jackson <Ian.Jackson@xxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Anders Kaseorg <andersk@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, linux-serial@xxxxxxxxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
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> 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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