linux-kernel - Re: [RFC PATCH 3/3] of: fix node traversing in of_dma_get

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Message-ID: <CAL_Jsq+1f2pHEy7=2Q7xGYYJjuQk3rLHH4pPTKRVN4QTtSr4Kw@mail.gmail.com>
Date:   Mon, 27 Mar 2017 09:34:35 -0500
From:   Rob Herring <robh@...nel.org>
To:     Oza Pawandeep <oza.oza@...adcom.com>
Cc:     Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>,
        Linux IOMMU <iommu@...ts.linux-foundation.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "bcm-kernel-feedback-list@...adcom.com" 
        <bcm-kernel-feedback-list@...adcom.com>
Subject: Re: [RFC PATCH 3/3] of: fix node traversing in of_dma_get_range

On Sat, Mar 25, 2017 at 12:31 AM, Oza Pawandeep <oza.oza@...adcom.com> wrote:
> it jumps to the parent node without examining the child node.
> also with that, it throws "no dma-ranges found for node"
> for pci dma-ranges.
>
> this patch fixes device node traversing for dma-ranges.

What's the DT look like that doesn't work?

dma-ranges is supposed to be a bus property, not a device's property.
So looking at the parent is correct behavior generally.

Rob