linux-kernel - Re: [v2] rpaphp: fix slot registration for multiple slots under a PHB

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Date:	Wed, 20 Jul 2016 19:10:25 +1000 (AEST)
From:	Michael Ellerman <patch-notifications@...erman.id.au>
To:	Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>,
	linux-pci@...r.kernel.org
Cc:	mdroth@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>,
	bhelgaas@...gle.com, nfont@...ux.vnet.ibm.com,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [v2] rpaphp: fix slot registration for multiple slots under a PHB

On Mon, 2016-11-07 at 22:16:27 UTC, Tyrel Datwyler wrote:
> PowerVM seems to only ever provide a single hotplug slot per PHB.
> The under lying slot hotplug registration code assumed multiple slots,
> but the actual implementation is broken for multiple slots. This went
> unnoticed for years due to the nature of PowerVM as mentioned
> previously. Under qemu/kvm the hotplug slot model aligns more with
> x86 where multiple slots are presented under a single PHB. As seen
> in the following each additional slot after the first fails to
> register due to each slot always being compared against the first
> child node of the PHB in the device tree.
...
> 
> Signed-off-by: Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/e2413a7dae52fab290b7a8d11e

cheers