linux-kernel - Re: [PATCH 07/26] iommu/dma: move the arm64 wrappers to common code

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Message-ID: <5e119919-bbfd-14a4-0258-93e8249d11c4@nvidia.com>
Date:   Tue, 4 Jun 2019 12:35:05 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     Christoph Hellwig <hch@....de>
CC:     Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        <iommu@...ts.linux-foundation.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        linux-tegra <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH 07/26] iommu/dma: move the arm64 wrappers to common code


On 04/06/2019 07:05, Christoph Hellwig wrote:
> On Mon, Jun 03, 2019 at 08:47:57PM +0100, Jon Hunter wrote:
>> Since next-20190529 one of our tests for MMC has started failing, where
>> the symptom is that the data written to the MMC does not match the
>> source. Bisecting this is pointing to this commit. Unfortunately, I am
>> not able to cleanly revert this on top of -next, but wanted to report
>> this if case you have any ideas.
> 
> Does this fix your problem?
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git/commit/?h=generic-dma-ops&id=1b961423158caaae49d3900b7c9c37477bbfa9b3

Yes I can confirm with this patch on today's -next the issue is no
longer seen, and reverting this patch on top of today's -next causes the
problem to occur again. So yes this fixes my problem.

Thanks!
Jon

-- 
nvpublic