Re: [PATCH] acpiphp: Prevent deadlock on PCI-to-PCI bridge remove

[Jesse Barnes <jbarnes@virtuousgeek.org>]

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On Wed, 28 Sep 2011 19:40:53 -0400
Prarit Bhargava <prarit@redhat.com> wrote:

> I originally submitted a patch to workaround this by pushing all Ejection
> Requests and Device Checks onto the kacpi_hotplug queue.
> 
> http://marc.info/?l=linux-acpi&m=131678270930105&w=2
> 
> The patch is still insufficient in that Bus Checks also need to be added.
> 
> Rather than add all events, including non-PCI-hotplug events, to the
> hotplug queue, mjg suggested that a better approach would be to modify
> the acpiphp driver so only acpiphp events would be added to the
> kacpi_hotplug queue.
> 
> It's a longer patch, but at least we maintain the benefit of having separate
> queues in ACPI.  This, of course, is still only a workaround the problem.
> As Bjorn and mjg pointed out, we have to refactor a lot of this code to do
> the right thing but at this point it is a better to have this code working.
> 
> Jesse -- Unless there are any objections from the ACPI guys, I think this
> patch should be pushed through linux-pci now since 95% of the changes are
> contained within drivers/pci/hotplug.

Applied to linux-next, thanks.

-- 
Jesse Barnes, Intel Open Source Technology Center

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