linux-kernel - Re: [PATCH v2] drm/mcde: dsi: Fix return value check in mcde_dsi

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Date:   Thu, 30 Apr 2020 13:56:23 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Wei Yongjun <weiyongjun1@...wei.com>,
        dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH v2] drm/mcde: dsi: Fix return value check in
 mcde_dsi_bind()

> The of_drm_find_bridge() function returns NULL on error, it doesn't return
> error pointers so this check doesn't work.

How do you think about a wording variant like the following?

   Change description:
   An error pointer check was performed after a call of the
   function “of_drm_find_bridge” despite of the detail
   that failures are indicated for the bridge search
   by null pointers instead.
   Thus adjust a check for the failure predicate
   and the corresponding exception handling.

Regards,
Markus