linux-kernel - Re: [PATCH v2 04/35] brcmfmac: firmware: Support having multiple alt paths

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Message-ID: <CAHp75VfCJhMi35OnnE+hxp43PjpGYN1vteuMqX0J+1xZ+=az5w@mail.gmail.com>
Date:   Fri, 7 Jan 2022 11:55:09 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Hector Martin <marcan@...can.st>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Chi-hsien Lin <chi-hsien.lin@...ineon.com>,
        Wright Feng <wright.feng@...ineon.com>,
        Sven Peter <sven@...npeter.dev>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Mark Kettenis <kettenis@...nbsd.org>,
        Rafał Miłecki <zajec5@...il.com>,
        Pieter-Paul Giesberts <pieter-paul.giesberts@...adcom.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        "John W. Linville" <linville@...driver.com>,
        "brian m. carlson" <sandals@...stytoothpaste.net>,
        "open list:TI WILINK WIRELES..." <linux-wireless@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        "open list:BROADCOM BRCM80211 IEEE802.11n WIRELESS DRIVER" 
        <brcm80211-dev-list.pdl@...adcom.com>,
        SHA-cyfmac-dev-list@...ineon.com
Subject: Re: [PATCH v2 04/35] brcmfmac: firmware: Support having multiple alt paths

On Fri, Jan 7, 2022 at 5:12 AM Dmitry Osipenko <digetx@...il.com> wrote:
> 06.01.2022 20:58, Andy Shevchenko пишет:
> > On Thu, Jan 6, 2022 at 7:40 PM Dmitry Osipenko <digetx@...il.com> wrote:
> >> 05.01.2022 16:22, Hector Martin пишет:

...

> >> while (alt_paths.index)
> >>         kfree(alt_paths.path[--alt_paths.index]);
> >
> > Usual pattern is
> >
> >   while (x--)
> >     kfree(x);

I have to elaborate that my point is to have postdecrement in the
while() instead of doing predecrement in its body. So the above
example will look

  while (alt_paths.index--)
    kfree(alt_paths.path[alt_paths.index]);

> > easier to read, extend (if needed).
>
> That is indeed a usual patter for the driver removal code paths. I
> didn't like to have index of struct brcmf_fw underflowed, but I see now
> that fwctx is dynamically created and freed during driver probe, so it
> should be fine to use that usual pattern here too.



-- 
With Best Regards,
Andy Shevchenko