linux-kernel - Re: [PATCH v6 4/8] drm: tda998x: use cec_notifier_conn

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Date:   Wed, 14 Aug 2019 12:52:06 +0200
From:   Dariusz Marcinkiewicz <darekm@...gle.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     dri-devel@...ts.freedesktop.org, linux-media@...r.kernel.org,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 4/8] drm: tda998x: use cec_notifier_conn_(un)register

Hello.

On Tue, Aug 13, 2019 at 1:20 PM Russell King - ARM Linux admin
<linux@...linux.org.uk> wrote:
>
> This also doesn't make sense: tda998x_destroy() is the opposite of
> tda998x_create().  However, tda998x_connector_destroy() is the
> opposite of tda998x_connector_create().
>
> By moving the CEC creation code into tda998x_connector_create(), you
> are creating the possibility for the following sequence to mess up
> CEC and leak:
>
>         tda998x_create()
>         tda998x_connector_create()
>         tda998x_connector_destroy()
>         tda998x_connector_create()
>         tda998x_connector_destroy()
>         tda998x_destroy()
>
> Anything you create in tda998x_connector_create() must be cleaned up
> by tda998x_connector_destroy().
>
Thank you.

I've just sent out another revision of the patch, where registration
and deregistration is symmetric. Please take a look.

Best regards.