linux-kernel - Re: "Convert the AMD iommu driver to the dma-iommu api" is buggy

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Message-ID: <20191016153112.GF4695@suse.de>
Date:   Wed, 16 Oct 2019 17:31:12 +0200
From:   Joerg Roedel <jroedel@...e.de>
To:     Qian Cai <cai@....pw>
Cc:     Tom Murphy <murphyt7@....ie>, Robin Murphy <robin.murphy@....com>,
        Christoph Hellwig <hch@....de>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: "Convert the AMD iommu driver to the dma-iommu api" is buggy

Hi Qian,

thanks for the report!

On Wed, Oct 16, 2019 at 10:59:42AM -0400, Qian Cai wrote:
> On Wed, 2019-10-16 at 10:55 -0400, Qian Cai wrote:
> > Today's linux-next generates a lot of warnings on multiple servers during boot
> > due to the series "iommu/amd: Convert the AMD iommu driver to the dma-iommu api"
> > [1]. Reverted the whole things fixed them.
> > 
> > [1] https://lore.kernel.org/lkml/20190908165642.22253-1-murphyt7@tcd.ie/
> > 
> 
> BTW, the previous x86 warning was from only reverted one patch "iommu: Add gfp
> parameter to iommu_ops::map" where proved to be insufficient. Now, pasting the
> correct warning.

I am looking into it and may send you fixes to test.

Thanks,

	Joerg