linux-kernel - Re: [stable][PATCH] PCIe hot-plug for Intel IOMMU

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Message-ID: <1257993435.3907.86.camel@macbook.infradead.org>
Date:	Thu, 12 Nov 2009 02:37:15 +0000
From:	David Woodhouse <dwmw2@...radead.org>
To:	Fenghua Yu <fenghua.yu@...el.com>
Cc:	Greg KH <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org, jbarnes@...tuousgeek.org,
	Yinghai Lu <yhlu.kernel@...il.com>, stable@...nel.org,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [stable][PATCH] PCIe hot-plug for Intel IOMMU

On Wed, 2009-11-11 at 07:23 -0800, Fenghua Yu wrote:
> To support PCIe hot plug in IOMMU, we register a notifier to respond to device
> change action.
> 
> When the notifier gets BUS_NOTIFY_UNBOUND_DRIVER, it removes the device from its
> DMAR domain.
> 
> A hot added device will be added into an IOMMU domain when it first does IOMMU
> op. So there is no need to add more code for hot add.
> 
> Without the patch, after a hot-remove, a hot-added device on the same slot will
> not work.
> 
> Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> 
> ---
> 
> The patch missed 2.6.32 release. Could it be in 2.6.32 stable?

Not strictly a regression, but it would make a lot of sense.

Fenghua, please could you test what's in
git://git.infradead.org/~dwmw2/iommu-2.6.32.git on IA64 before I send it
to Linus? There are a couple of other fixes for HP brain damage there.


-- 
dwmw2

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