linux-kernel - [PATCH 2/4] media: nuvoton: Fix reference handling of ece

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Message-Id: <20250121-nuvoton-v1-2-1ea4f0cdbda2@chromium.org>
Date: Tue, 21 Jan 2025 21:14:51 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Joseph Liu <kwliu@...oton.com>, Marvin Lin <kflin@...oton.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Hans Verkuil <hverkuil@...all.nl>, Philipp Zabel <p.zabel@...gutronix.de>
Cc: Marvin Lin <milkfafa@...il.com>, linux-media@...r.kernel.org, 
 openbmc@...ts.ozlabs.org, linux-kernel@...r.kernel.org, 
 Ricardo Ribalda <ribalda@...omium.org>, stable@...r.kernel.org
Subject: [PATCH 2/4] media: nuvoton: Fix reference handling of ece_node

Make sure all the code paths call of_node_put().

Cc: stable@...r.kernel.org
Fixes: 46c15a4ff1f4 ("media: nuvoton: Add driver for NPCM video capture and encoding engine")
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 drivers/media/platform/nuvoton/npcm-video.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/nuvoton/npcm-video.c b/drivers/media/platform/nuvoton/npcm-video.c
index 7b4c23dbe709..f6cba17a7924 100644
--- a/drivers/media/platform/nuvoton/npcm-video.c
+++ b/drivers/media/platform/nuvoton/npcm-video.c
@@ -1665,11 +1665,11 @@ static int npcm_video_ece_init(struct npcm_video *video)
 		dev_info(dev, "Support HEXTILE pixel format\n");
 
 		ece_pdev = of_find_device_by_node(ece_node);
+		of_node_put(ece_node);
 		if (!ece_pdev) {
 			dev_err(dev, "Failed to find ECE device\n");
 			return -ENODEV;
 		}
-		of_node_put(ece_node);
 
 		regs = devm_platform_ioremap_resource(ece_pdev, 0);
 		if (IS_ERR(regs)) {
@@ -1692,6 +1692,8 @@ static int npcm_video_ece_init(struct npcm_video *video)
 			dev_err(dev, "Failed to get ECE reset control in DTS\n");
 			return PTR_ERR(video->ece.reset);
 		}
+	} else {
+		of_node_put(ece_node);
 	}
 
 	return 0;

-- 
2.48.0.rc2.279.g1de40edade-goog