linux-kernel - Re: [PATCH v2 5/5] of/fdt: only store the device node basename in full

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Message-ID: <CABGGisxU2OPZz-rrWYZYgCQ0iGM9w5vL9Ob9BTHALFN8JyxeJQ@mail.gmail.com>
Date:   Tue, 17 Oct 2017 16:46:27 -0500
From:   Rob Herring <robh@...nel.org>
To:     Alan Tull <atull@...nel.org>
Cc:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev@...ts.ozlabs.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        David Laight <David.Laight@...lab.com>
Subject: Re: [PATCH v2 5/5] of/fdt: only store the device node basename in full_name

On Tue, Oct 17, 2017 at 4:32 PM, Alan Tull <atull@...nel.org> wrote:
> On Mon, Aug 21, 2017 at 10:16 AM, Rob Herring <robh@...nel.org> wrote:
>
> Hi Rob,
>
>> With dependencies on a statically allocated full path name converted to
>> use %pOF format specifier, we can store just the basename of node, and
>> the unflattening of the FDT can be simplified.
>>
>> This commit will affect the remaining users of full_name. After
>> analyzing these users, the remaining cases should only change some print
>> messages. The main users of full_name are providing a name for struct
>> resource. The resource names shouldn't be important other than providing
>> /proc/iomem names.
>>
>> We no longer distinguish between pre and post 0x10 dtb formats as either
>> a full path or basename will work. However, less than 0x10 formats have
>> been broken since the conversion to use libfdt (and no one has cared).
>> The conversion of the unflattening code to be non-recursive also broke
>> pre 0x10 formats as the populate_node function would return 0 in that
>> case.
>>
>> Signed-off-by: Rob Herring <robh@...nel.org>
>> ---
>> v2:
>> - rebase to linux-next
>>
>>  drivers/of/fdt.c | 69 +++++++++-----------------------------------------------
>>  1 file changed, 11 insertions(+), 58 deletions(-)
>
> I've just updated to the latest next branch and am finding problems
> applying overlays.   Reverting this commit alleviates things.  The
> errors I get are:
>
> [   88.498704] OF: overlay: Failed to apply prop @/__symbols__/clk_0
> [   88.513447] OF: overlay: apply failed '/__symbols__'
> [   88.518423] create_overlay: Failed to create overlay (err=-12)

Frank's series with overlay updates should fix this.

Rob