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From: Arnd Bergmann <arnd@kernel.org>
To: Mauro Carvalho Chehab <mchehab@kernel.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Hans Verkuil <hverkuil-cisco@xs4all.nl>,
	Moudy Ho <moudy.ho@mediatek.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	AngeloGioacchino Del Regno 
	<angelogioacchino.delregno@collabora.com>,
	Sun Ke <sunke32@huawei.com>,
	Ping-Hsun Wu <ping-hsun.wu@mediatek.com>,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: [PATCH] media: platform: mtk-mdp3: work around unused-variable warning
Date: Tue, 18 Apr 2023 11:15:48 +0200	[thread overview]
Message-ID: <20230418091555.2605961-1-arnd@kernel.org> (raw)

From: Arnd Bergmann <arnd@arndb.de>

When CONFIG_OF is disabled, the 'data' variable is not used at all
because of_match_node() turns into a dummy macro:

drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c: In function 'mdp_comp_sub_create':
drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c:1038:36: error: unused variable 'data' [-Werror=unused-variable]
 1038 |  const struct mtk_mdp_driver_data *data = mdp->mdp_data;
      |                                    ^~~~

Remove the variable again by moving the pointer dereference into the
of_match_node call.

Fixes: b385b991ef2f ("media: platform: mtk-mdp3: chip config split about subcomponents")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c
index 75c92e282fa2..19a4a085f73a 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c
@@ -1035,7 +1035,6 @@ static int mdp_comp_sub_create(struct mdp_dev *mdp)
 {
 	struct device *dev = &mdp->pdev->dev;
 	struct device_node *node, *parent;
-	const struct mtk_mdp_driver_data *data = mdp->mdp_data;
 
 	parent = dev->of_node->parent;
 
@@ -1045,7 +1044,7 @@ static int mdp_comp_sub_create(struct mdp_dev *mdp)
 		int id, alias_id;
 		struct mdp_comp *comp;
 
-		of_id = of_match_node(data->mdp_sub_comp_dt_ids, node);
+		of_id = of_match_node(mdp->mdp_data->mdp_sub_comp_dt_ids, node);
 		if (!of_id)
 			continue;
 		if (!of_device_is_available(node)) {
-- 
2.39.2


             reply	other threads:[~2023-04-18  9:16 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-18  9:15 Arnd Bergmann [this message]
2023-04-18 11:49 ` [PATCH] media: platform: mtk-mdp3: work around unused-variable warning Matthias Brugger

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