linux-kernel - Re: HPA Resume patch

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Date:	Sun, 27 Aug 2006 14:16:56 +0400
From:	Sergey Vlasov <vsu@...linux.ru>
To:	Lee Trager <Lee@...turesInMotion.net>
Cc:	B.Zolnierkiewicz@...a.pw.edu.pl, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org, akpm@...l.org
Subject: Re: HPA Resume patch

On Sun, 27 Aug 2006 04:42:03 -0400 Lee Trager wrote:

> This patch fixes a problem with computers that have HPA on their hard
> drive and not being able to come out of resume from RAM or disk. I've
> tested this patch on 2.6.17.x and 2.6.18-rc4 and it works great on both
> of these. This patch also fixes the bug #6840. This is my first patch to
> the kernel and I was told to e-mail the above people to get my patch
> into the kernel. If I made a mistake please be gentle and correct me ;)

The patch adds a call from ide.c to a function inside ide-disk.c - this
won't work when IDE support is built as modules (it will cause a
circular dependency between ide-core and ide-disk modules).

The proper way to do such calls is to add a new method to ide_driver_t
and call it from generic_ide_resume().  Also, if the ide_do_drive_cmd()
call failed, it is probably unsafe to reset HPA, so you need to check
the result and call the resume method only if the low-level resume has
succeeded.

And please and "-p" to diff options.

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