linux-kernel - Re: [PATCH] Fix PCIe hotplug for Dell notebook ExpressCard slots

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Message-ID: <471538D4.1020001@rtr.ca>
Date:	Tue, 16 Oct 2007 18:19:00 -0400
From:	Mark Lord <lkml@....ca>
To:	Greg KH <greg@...ah.com>
Cc:	Kristen Carlson Accardi <kristen.c.accardi@...el.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	pcihpd-discuss@...ts.sourceforge.net,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Fix PCIe hotplug for Dell notebook ExpressCard slots

Greg KH wrote:
> On Tue, Oct 16, 2007 at 05:57:03PM -0400, Mark Lord wrote:
>> Fix PCIe Hotplug so that it works with ExpressCard slots on Dell notebooks
>> in conjunction with modparam of pciehp_force=1.
>>
>> The PCIe Hotplug driver has two shortcomings when used on Dell notebooks
>> which lack ACPI BIOS support for PCIe hotplug:
> 
> Wait, Dell explicitly says that pci hotplug of express cards is not
> supported and is broken on these laptops.  This is because the version
> of Windows they support on these machines also does not support
> hotplugging these devices.
> 
> The current code works just fine on hardware that actually supports this
> kind of functionality, as per the proper specs and requirements for this
> feature.
> 
> So why try to go through these gyrations for hardware that is explicitly
> broken?

Because it is NOT broken.  It works perfectly.

There's just a couple of issues in the existing *working* Linux driver
that need fixing, that's all.

Cheers
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