linux-kernel - Re: [PATCH v2 -rt] ide: workaround buggy hardware issues with preemptable hardirqs

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Message-ID: <20080629134943.19b94bd2@lxorguk.ukuu.org.uk>
Date:	Sun, 29 Jun 2008 13:49:43 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Sergei Shtylyov <sshtylyov@...mvista.com>
Cc:	avorontsov@...mvista.com, Ingo Molnar <mingo@...e.hu>,
	linux-ide@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Daniel Walker <dwalker@...sta.com>
Subject: Re: [PATCH v2 -rt] ide: workaround buggy hardware issues with
 preemptable hardirqs

>    His boot log shows the native mode.

Then the bridge is misprogrammed

>    What's IDEIRT, some ISA bridge register? And why should one set 
> [A]PIC to level mode for legacy mode IDE? :-O

You need an NDA and then they'll send you the data sheet for the bridges
and other logic. It's all programmable.

"He has an OpenPIC, it's PowerPC SoC, so no ELCR either"

Really - he's using a designed for PC ISA bridge etc.. he might have all
sorts of stuff on it.

Alan
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