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From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Tue, 24 Apr 2018 19:24:33 +0300
Message-ID: <CAHp75VecPW_v0r+L01jWubASMAQ4iCoUX4G3pcyfzn9Gf21CtQ@mail.gmail.com>
Subject: Re: [RESEND PATCH] staging: bcm2835-audio: Disconnect and free
 vchi_instance on module_exit()
To:     Kirill Marinushkin <k.marinushkin@gmail.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Eric Anholt <eric@anholt.net>,
        Stefan Wahren <stefan.wahren@i2se.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Ray Jui <rjui@broadcom.com>,
        Scott Branden <sbranden@broadcom.com>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@broadcom.com>,
        linux-rpi-kernel@lists.infradead.org,
        linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
        devel@driverdev.osuosl.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Tue, Apr 24, 2018 at 10:44 AM, Kirill Marinushkin
<k.marinushkin@gmail.com> wrote:
> In the current implementation, vchi_instance is inited during the first
> call of bcm2835_audio_open_connection(), and is never freed. It causes a
> memory leak when the module `snd_bcm2835` is removed.


> Signed-off-by: Kirill Marinushkin <k.marinushkin@gmail.com>
> Cc: Eric Anholt <eric@anholt.net>
> Cc: Stefan Wahren <stefan.wahren@i2se.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Florian Fainelli <f.fainelli@gmail.com>
> Cc: Ray Jui <rjui@broadcom.com>
> Cc: Scott Branden <sbranden@broadcom.com>
> Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
> Cc: bcm-kernel-feedback-list@broadcom.com
> Cc: linux-rpi-kernel@lists.infradead.org
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: devel@driverdev.osuosl.org
> Cc: linux-kernel@vger.kernel.org

AFAIR I gave you a tag and you again missed it.
Before sending anything just check twice if all prerequisites are fulfilled.

And yes, kbuild bot is right. You need to return known value.

-- 
With Best Regards,
Andy Shevchenko