linux-kernel - Re: [PATCH] MIPS: BCM63xx: Add check for NULL for clk in clk

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Message-ID: <CAOiHx=nc46Hj4wDGC0ci8+SrAkJZ9i_7-yZU1D8cWkpS6prGoQ@mail.gmail.com>
Date:   Fri, 25 Nov 2022 15:14:50 +0100
From:   Jonas Gorski <jonas.gorski@...il.com>
To:     Anastasia Belova <abelova@...ralinux.ru>
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Maxime Bizon <mbizon@...ebox.fr>,
        Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH] MIPS: BCM63xx: Add check for NULL for clk in clk_enable

On Fri, 25 Nov 2022 at 10:28, Anastasia Belova <abelova@...ralinux.ru> wrote:
>
> Check clk for NULL before calling clk_enable_unlocked where clk
> is dereferenced. There is such check in other implementations
> of clk_enable.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> Fixes: e7300d04bd08 ("MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.")
> Signed-off-by: Anastasia Belova <abelova@...ralinux.ru>
> ---
>  arch/mips/bcm63xx/clk.c | 3 +++
>  1 file changed, 3 insertions(+)

Makes sense, especially since clk_disable() already has a NULL check
(in case anybody else wonders).

Reviewed-by: Jonas Gorski <jonas.gorski@...il.com>