linux-kernel - Re: 2.6.23-rc7 - _random

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Message-ID: <46FCCF94.9060400@gmail.com>
Date:	Fri, 28 Sep 2007 02:55:32 -0700
From:	Tejun Heo <htejun@...il.com>
To:	Paul Rolland <rol@...917.net>
CC:	David Newall <david@...idnewall.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	IDE/ATA development list <linux-ide@...r.kernel.org>,
	rol@...be.net
Subject: Re: 2.6.23-rc7 - _random_ IRQ23 : nobody cared

Paul Rolland wrote:
>> Can you change driver load order such that the driver for the modem is
>> loaded first?
> 
> As I said, it's not possible, because :
>  - the modem driver is an out-kernel one, so I have to wait the end of the
>    boot process so that it can be loaded,
>  - libata on IRQ23 is the one taking care of my disks, and I suspect it 
>    quite hard to install a modem driver before having the disk driver
>    installed.

You can do both by...

1. Build the modem driver into the kernel.  char drivers are linked in
before ATA ones, so it will attach first.

2. Using a custom initrd with emergency shell.  initrd is loaded by BIOS
so no driver is involved.  I don't actually know how to do this tho.

3. Put in an extra disk controller and boot from it with both drivers
compiled as module.

-- 
tejun
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