linux-kernel - Re: [PATCH 1/2] iommu/tegra: smmu: Add device tree support for SMMU

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Message-ID: <4FB52BE7.8080908@wwwdotorg.org>
Date:	Thu, 17 May 2012 10:48:39 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Hiroshi DOYU <hdoyu@...dia.com>,
	Joerg Roedel <joerg.roedel@....com>
CC:	linux-tegra@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Ohad Ben-Cohen <ohad@...ery.com>,
	Tony Lindgren <tony@...mide.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Thierry Reding <thierry.reding@...onic-design.de>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] iommu/tegra: smmu: Add device tree support for SMMU

On 05/14/2012 11:41 AM, Stephen Warren wrote:
> On 05/10/2012 01:50 AM, Hiroshi DOYU wrote:
>> The necessary info is expected to pass from DT.
>>
>> For more precise resource reservation, there shouldn't be any
>> overlapping of register range between SMMU and MC. SMMU register
>> offset needs to be calculated correctly, based on its register bank.
>>
>> Signed-off-by: Hiroshi DOYU <hdoyu@...dia.com>
>> ---
>> This patch requires the following ones, sent earlier:
>>
>> DMA window:
>> http://article.gmane.org/gmane.linux.ports.tegra/4603
> 
> This patch has been merged even though the patch above isn't present in
> the kernel anywhere, let alone in the history of the iommu tree. This
> breaks compilation in linux-next.
> 
>> AHB:
>> http://article.gmane.org/gmane.linux.ports.tegra/4657
> 
> This patch is in linux-next, but also is not in the history of the iommu
> tree, so will break bisection of the iommu tree for Tegra.

Joerg,

Can this patch please be dropped or reverted? It's still breaking
tegra_defconfig in next-20120517 since the dependencies I mentioned
above aren't satisfied. At this stage, it seems unlikely that the DMA
window parsing change is going to make it into 3.5, so this isn't just a
temporary issue.

Thanks.
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