linux-kernel - Re: [RFC PATCH 1/7] i2c: add sanity check for parameter of i2c_verify

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Message-ID: <CAMuHMdU3WgdV0cqf0Gu=szyNch=QOEK8UbiQyxLjsf+WnS=-ZA@mail.gmail.com>
Date:   Fri, 21 Feb 2020 10:36:30 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     Linux I2C <linux-i2c@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        linux-i3c@...ts.infradead.org,
        Kieran Bingham <kieran@...uared.org.uk>,
        Niklas Söderlund <niklas.soderlund@...natech.se>,
        Luca Ceresoli <luca@...aceresoli.net>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [RFC PATCH 1/7] i2c: add sanity check for parameter of i2c_verify_client()

Hi Wolfram,

On Thu, Feb 20, 2020 at 6:26 PM Wolfram Sang
<wsa+renesas@...g-engineering.com> wrote:
> We export this function, so we should check the paramter to make it

parameter

> NULL-compatible.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

And then the check in i2c_acpi_find_client_by_adev() can be removed.
BTW, can the i2c_verify_client() check in that function actually fail?
If yes, it should call put_device(dev) on failure, like
of_find_i2c_device_by_node() does.

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