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    SubjectRe: v4.17 regression: PowerMac G3 won't boot, was Re: [PATCH v5 1/3] of: cache phandle nodes to reduce cost of of_find_node_by_phandle()
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    On Thu, 2018-08-30 at 21:36 -0700, Frank Rowand wrote:
    > > No idea whether that's relevant; I haven't done any further investigation.
    > > Complete dmesg output is attached. Please let me know if there's any more
    > > information you need to help find the bug.
    > >
    > > Thanks.
    >
    > I don't have any useful answers yet, but I am following the thread and have
    > also quickly scanned the two commits for any obvious cause. I will look
    > into this some more, but have a few other tasks that I need to complete
    > first.
    >
    > A long shot, but something to consider, is that I failed to cover the
    > cases of dynamic devicetree updates (removing nodes that contain a
    > phandle) in ways other than overlays. Michael Ellerman has reported
    > such a problem for powerpc/mobility with of_detach_node(). A patch to
    > fix that is one of the tasks I need to complete.

    The only thing I can think of is booting via the BootX bootloader on
    those ancient macs results in a DT with no phandles. I didn't see an
    obvious reason why that would cause that patch to break though.

    Cheers,
    Ben.

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