linux-kernel - Re: [PATCH] iommu: moving initialization earlier

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Message-ID: <CAKocOOMAfkv_a71gKhGRwTM-pZsfd8qG7VVWn22Yuv6pkcdQLQ@mail.gmail.com>
Date:	Thu, 10 Jan 2013 16:16:27 -0700
From:	Shuah Khan <shuahkhan@...il.com>
To:	Joerg Roedel <joro@...tes.org>
Cc:	Alexey Kardashevskiy <aik@...abs.ru>,
	Joerg Roedel <joerg.roedel@....com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
	Shuah Khan <shuah.khan@...com>
Subject: Re: [PATCH] iommu: moving initialization earlier

On Thu, Jan 10, 2013 at 1:40 PM, Shuah Khan <shuahkhan@...il.com> wrote:
> On Thu, Jan 10, 2013 at 10:09 AM, Joerg Roedel <joro@...tes.org> wrote:
>> On Mon, Jan 07, 2013 at 06:51:52PM +1100, Alexey Kardashevskiy wrote:
>>> The iommu_init() initializes IOMMU internal structures and data
>>> required for the IOMMU API as iommu_group_alloc().
>>> It is registered as a subsys_initcall now.
>>>
>>> One of the IOMMU users is going to be a PCI subsystem on POWER.
>>> It discovers new IOMMU tables during the PCI scan so the logical
>>> place to call iommu_group_alloc() is the moment when a new group
>>> is discovered. However PCI scan is done from subsys_initcall hook
>>> as IOMMU does so PCI hook can be (and is) called before the IOMMU one.
>>>
>>> The patch moves IOMMU subsystem initialization one step earlier
>>> to make sure that IOMMU is initialized before PCI scan begins.
>>>
>>> Signed-off-by: Alexey Kardashevskiy <aik@...abs.ru>
>>
>> Applied, thanks.
>
> Joerg,
>
> Could you please consider this patch for stable releases.

The patch applies cleanly only on 3.6.y which is EOL. Guess I am out
of luck with this patch.

-- Shuah

-- Shuah
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