linux-kernel - Re: [PATCH] clk: meson: meson8b: fix a memory leak in meson8b_clkc_init

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Date:   Sun, 24 Apr 2022 21:36:12 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     xkernel.wang@...mail.com, Neil Armstrong <narmstrong@...libre.com>,
        jbrunet@...libre.com, mturquette@...libre.com,
        khilman@...libre.com, p.zabel@...gutronix.de,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: meson: meson8b: fix a memory leak in meson8b_clkc_init_common()

Hi Stephen,

On Sat, Apr 23, 2022 at 4:25 AM Stephen Boyd <sboyd@...nel.org> wrote:
[...]
> > Also a note about meson8b_clkc_init_common() itself: failures in that
> > function will result in a non-working system.
> > If we can't register the reset controller then most devices won't
> > probe and CPU SMP cannot work.
> > If registering any clock or the clock controller doesn't work then the
> > system also won't work as clocks are not available to other drivers.
> > So freeing memory in case of an error is good to have, but the end
> > result is still the same: the system won't work.
> >
>
> Can we get far enough to record this fact into either a pstore ramoops
> location or the serial console? That would be ideal to make debugging
> early problems easier.
earlycon shows these messages (as it's enabled by the bootloader)
while "normal" serial console won't come up without the corresponding
clocks.
I never tried ramoops but I expect it to be able to log these errors as well.


Best regards,
Martin