linux-kernel - Re: [PATCH] drm: mediatek: Drop unnecessary check for property presence

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Message-ID: <9b983add-45a4-497d-ab95-188f8ca1c0d1@collabora.com>
Date: Thu, 1 Aug 2024 10:23:54 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: "Rob Herring (Arm)" <robh@...nel.org>,
 Chun-Kuang Hu <chunkuang.hu@...nel.org>,
 Philipp Zabel <p.zabel@...gutronix.de>, David Airlie <airlied@...il.com>,
 Daniel Vetter <daniel@...ll.ch>, Matthias Brugger <matthias.bgg@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-mediatek@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] drm: mediatek: Drop unnecessary check for property
 presence

Il 31/07/24 22:13, Rob Herring (Arm) ha scritto:
> of_property_read_u32() returns -EINVAL if a property is not present, so
> the preceeding check for presence with of_find_property() can be
> dropped. Really, what the errno is shouldn't matter. Either the property
> can be read and used or it can't and is ignored.
> 
> This is part of a larger effort to remove callers of of_find_property()
> and similar functions. of_find_property() leaks the DT struct property
> and data pointers which is a problem for dynamically allocated nodes
> which may be freed.
> 
> Signed-off-by: Rob Herring (Arm) <robh@...nel.org>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>