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Date:   Thu, 18 Jan 2018 07:09:23 -0800
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Subject: Re: [PATCH v4 4/8] PCI: brcmstb: Add dma-range mapping for inbound     traffic
To:     Christoph Hellwig <hch@lst.de>, Rob Herring <robh+dt@kernel.org>
CC:     Jim Quinlan <jim2101024@gmail.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        Brian Norris <computersforpeace@gmail.com>,
        Russell King <rmk+kernel@armlinux.org.uk>,
        Robin Murphy <robin.murphy@arm.com>,
        Jonas Gorski <jonas.gorski@gmail.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        Linux-MIPS <linux-mips@linux-mips.org>,
        linux-pci@vger.kernel.org, Kevin Cernekee <cernekee@gmail.com>,
        Ralf Baechle <ralf@linux-mips.org>,
        bcm-kernel-feedback-list@broadcom.com,
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        <linux-arm-kernel@lists.infradead.org>
From:   Florian Fainelli <f.fainelli@gmail.com>
Message-ID: <EDAEFB0F-BB7C-444A-B282-F178F5ADFCBF@gmail.com>
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On January 17, 2018 11:31:23 PM PST, Christoph Hellwig <hch@lst=2Ede> wrote=
:
>On Wed, Jan 17, 2018 at 08:15:33PM -0600, Rob Herring wrote:
>> > (a) overriding/redefining the dma_to_phys() and phys_to_dma() calls
>> > that are used by the dma_ops routines=2E  This is the approach of
>> >
>> >         arch/mips/cavium-octeon/dma-octeon=2Ec
>>=20
>> MIPS is rarely an example to follow=2E :)
>
>But in this case it actually is the example to follow as told
>previously=2E
>
>NAK again for these chained dma ops that only create problems=2E

Care to explain what should be done instead?

--=20
Florian