Messages in this thread | | | From | Martin Blumenstingl <> | Date | Mon, 1 Nov 2021 21:58:38 +0100 | Subject | Re: [PATCH] clk: composite: Also consider .determine_rate for rate + mux composites |
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Hi Guillaume,
On Mon, Nov 1, 2021 at 9:19 PM Guillaume Tucker <guillaume.tucker@collabora.com> wrote: > > Hi Martin, > > Please see the bisection report below about a boot failure on > rk3328-rock64. > > Reports aren't automatically sent to the public while we're > trialing new bisection features on kernelci.org but this one > looks valid. > > Some more details can be found here: > > https://linux.kernelci.org/test/case/id/617f11f5c157b666fb3358e6/ > > Here's what appears to be the cause of the problem: > > [ 0.033465] CPU: CPUs started in inconsistent modes > [ 0.033557] Unexpected kernel BRK exception at EL1 > [ 0.034432] Internal error: BRK handler: f2000800 [#1] PREEMPT SMP > > There doesn't appear to be any other platform in KernelCI showing > the same issue. That's a strange error for the changes from my patch. At first glance I don't see any relation to clk-composite code: - the call trace doesn't have any references to CCF or rockchip clock drivers - clk-rk3328.c uses drivers/clk/rockchip/clk-cpu.c to register the CPU clock which does not use clk-composite
Chen-Yu has tested this patch (plus [0]) on RK3399 and didn't observe any problems. So maybe this is a RK3328 specific issue? Anyways, I am interested in fixing this issue because reverting is becoming more and more complex (since I think we're at eight commits which would need to be reverted in total).
> Please let us know if you need help debugging the issue or if you > have a fix to try. Could you please try [0] which is the second patch in the series which finally made it upstream. This second patch is not in 5.15 because I believed that it's only something to make the code in clk-composite.c more future-proof. It's not a condition that I am aware of.
I don't have any Rockchip boards myself. So I am thankful for any help I can get.
Best regards, Martin
[0] https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/commit/?h=clk-next&id=6594988fd625ff0d9a8f90f1788e16185358a3e6
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