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Date:   Wed, 25 Oct 2023 12:47:57 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Pavel Machek <pavel@...x.de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        niklas.soderlund+renesas@...natech.se,
        yoshihiro.shimoda.uh@...esas.com, geert+renesas@...der.be,
        biju.das.jz@...renesas.com, Chris.Paterson2@...esas.com,
        stable@...r.kernel.org, patches@...ts.linux.dev,
        linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        akpm@...ux-foundation.org, linux@...ck-us.net, shuah@...nel.org,
        patches@...nelci.org, lkft-triage@...ts.linaro.org,
        jonathanh@...dia.com, f.fainelli@...il.com,
        sudipm.mukherjee@...il.com, srw@...dewatkins.net, rwarsow@....de,
        conor@...nel.org
Subject: Re: renesas_sdhi problems in 5.10-stable was Re: [PATCH 5.10 000/226]
 5.10.198-rc1 review

Hi Pavel,

On Tue, Oct 24, 2023 at 9:22 PM Pavel Machek <pavel@...x.de> wrote:
> > > > And testing failed. So
> > > >
> > > > commit f5799b4e142884c2e7aa99f813113af4a3395ffb
> > > > Author: Wolfram Sang <wsa+renesas@...g-engineering.com>
> > > > Date:   Tue Nov 10 15:20:57 2020 +0100
> > > >
> > > >     mmc: renesas_sdhi: populate SCC pointer at the proper place
> > > >
> > > >     [ Upstream commit d14ac691bb6f6ebaa7eeec21ca04dd47300ff5b6 ]
> > > >
> > > > seems to be the buggy commit that breaks renesas boards in 5.10.
> > >
> > > This patch was part of a series. Did the other two patches come with it?
> > >
> > > b161d87dfd3d ("mmc: renesas_sdhi: probe into TMIO after SCC parameters have been setup")
> >
> > Yes.
> >
> > > 45bffc371fef ("mmc: renesas_sdhi: only reset SCC when its pointer is populated")
> >
> > No :(
> >
> > > If not, I could imagine that could lead to a crash. No idea why only
> > > with 5.10, though.
> >
> > The above commit is only in 5.11, so newer kernels should be fine.
> >
> > I'll go queue up the one missing patch now, thanks.
>
> Thank you. Patch indeed appears to be in 5.10.199.
>
> But we still have failures on Renesas with 5.10.199-rc2:
>
> https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/pipelines/1047368849
>
> And they still happed during MMC init:
>
>     2.638013] renesas_sdhi_internal_dmac ee100000.mmc: Got CD GPIO
> [    2.638846] INFO: trying to register non-static key.
> [    2.644192] ledtrig-cpu: registered to indicate activity on CPUs
> [    2.649066] The code is fine but needs lockdep annotation, or maybe
> [    2.649069] you didn't initialize this object before use?
> [    2.649071] turning off the locking correctness validator.
> [    2.649080] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.199-rc2-arm64-renesas-ge31b6513c43d #1
> [    2.649082] Hardware name: HopeRun HiHope RZ/G2M with sub board (DT)
> [    2.649086] Call trace:
> [    2.655106] SMCCC: SOC_ID: ARCH_SOC_ID not implemented, skipping ....
> [    2.661354]  dump_backtrace+0x0/0x194
> [    2.661361]  show_stack+0x14/0x20
> [    2.667430] usbcore: registered new interface driver usbhid
> [    2.672230]  dump_stack+0xe8/0x130
> [    2.672238]  register_lock_class+0x480/0x514
> [    2.672244]  __lock_acquire+0x74/0x20ec
> [    2.681113] usbhid: USB HID core driver
> [    2.687450]  lock_acquire+0x218/0x350
> [    2.687456]  _raw_spin_lock+0x58/0x80
> [    2.687464]  tmio_mmc_irq+0x410/0x9ac
> [    2.688556] renesas_sdhi_internal_dmac ee160000.mmc: mmc0 base at 0x00000000ee160000, max clock rate 200 MHz
> [    2.744936]  __handle_irq_event_percpu+0xbc/0x340
> [    2.749635]  handle_irq_event+0x60/0x100
> [    2.753553]  handle_fasteoi_irq+0xa0/0x1ec
> [    2.757644]  __handle_domain_irq+0x7c/0xdc
> [    2.761736]  efi_header_end+0x4c/0xd0
> [    2.765393]  el1_irq+0xcc/0x180
> [    2.768530]  arch_cpu_idle+0x14/0x2c
> [    2.772100]  default_idle_call+0x58/0xe4
> [    2.776019]  do_idle+0x244/0x2c0
> [    2.779242]  cpu_startup_entry+0x20/0x6c
> [    2.783160]  rest_init+0x164/0x28c
> [    2.786561]  arch_call_rest_init+0xc/0x14
> [    2.790565]  start_kernel+0x4c4/0x4f8
> [    2.794233] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000014
> [    2.803011] Mem abort info:
>
> from https://lava.ciplatform.org/scheduler/job/1025535
> from
> https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/jobs/5360973735 .
>
> Is there something else missing?

I don't have a HopeRun HiHope RZ/G2M, but both v5.10.198 and v5.10.199
seem to work fine on Salvator-XS with R-Car H3 ES2.0 and Salvator-X
with R-Car M3-W ES1.0, using a config based on latest renesas_defconfig.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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