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Date:   Tue, 25 Sep 2018 22:16:19 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Christoph Hellwig <hch@lst.de>, iommu@lists.linux-foundation.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Robin Murphy <robin.murphy@arm.com>,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Bjorn Helgaas <bhelgaas@google.com>, linux-pci@vger.kernel.org,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 4/4] dma-mapping: clear dev->dma_ops in
 arch_teardown_dma_ops
Message-ID: <20180925201619.GB8413@lst.de>
References: <20180827084711.23407-1-hch@lst.de> <20180827084711.23407-5-hch@lst.de> <20180922150119.GA14761@roeck-us.net>
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Looking at the code I think this commit is simply broken for
architectures not using arch_setup_dma_ops, but instead setting up
the dma ops through arch specific magic.

I'll revert the patch.