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Date: Fri, 31 Aug 2018 14:58:41 +1000 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: Frank Rowand <frowand.list@...il.com>, Finn Thain <fthain@...egraphics.com.au> Cc: Stan Johnson <userm57@...oo.com>, Rob Herring <robh+dt@...nel.org>, Chintan Pandya <cpandya@...eaurora.org>, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org Subject: Re: 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() 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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