Date: Wed, 25 Jun 2008 13:32:57 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: avorontsov@ru.mvista.com
Cc: Ingo Molnar <mingo@elte.hu>, linux-ide@vger.kernel.org,
       Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>,
       Sergei Shtylyov <sshtylyov@ru.mvista.com>, linux-kernel@vger.kernel.org,
       Thomas Gleixner <tglx@linutronix.de>,
       Steven Rostedt <rostedt@goodmis.org>,
       Daniel Walker <dwalker@mvista.com>
Subject: Re: [PATCH -rt] ide: fix interrupts processing issue with
 preempt-able hardirqs
Message-ID: <20080625133257.7677258d@lxorguk.ukuu.org.uk>
In-Reply-To: <20080625123431.GA25452@polina.dev.rtsoft.ru>
References: <20080623234037.GA6793@polina.dev.rtsoft.ru>
	<20080623235141.GB17297@elte.hu>
	<20080624000016.GA12547@polina.dev.rtsoft.ru>
	<20080625123431.GA25452@polina.dev.rtsoft.ru>
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> The bug, as I see it, in the alim15x3 (ULi M5228) hardware: for some
> reason it does not hold IRQ line, but rises it for some short period
> of time (while the drive itself rises and holds it correctly -- I'm
> seeing it via oscilloscope).

Are you sure the kernel isn't touching the status register and so
clearing the IRQ condition at the controller ?
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