linux-kernel - [PATCH v2] drm/imx/tve: fix probe device leak

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Message-ID: <20251030163456.15807-1-johan@kernel.org>
Date: Thu, 30 Oct 2025 17:34:56 +0100
From: Johan Hovold <johan@...nel.org>
To: Philipp Zabel <p.zabel@...gutronix.de>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	dri-devel@...ts.freedesktop.org,
	imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Johan Hovold <johan@...nel.org>,
	stable@...r.kernel.org,
	Frank Li <Frank.Li@....com>
Subject: [PATCH v2] drm/imx/tve: fix probe device leak

Make sure to drop the reference taken to the DDC device during probe on
probe failure (e.g. probe deferral) and on driver unbind.

Fixes: fcbc51e54d2a ("staging: drm/imx: Add support for Television Encoder (TVEv2)")
Cc: stable@...r.kernel.org	# 3.10
Cc: Philipp Zabel <p.zabel@...gutronix.de>
Reviewed-by: Frank Li <Frank.Li@....com>
Signed-off-by: Johan Hovold <johan@...nel.org>
---

Changes in v2:
 - add missing NULL ddc check


 drivers/gpu/drm/imx/ipuv3/imx-tve.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/imx/ipuv3/imx-tve.c b/drivers/gpu/drm/imx/ipuv3/imx-tve.c
index fd1e617e171e..68bbbdbd347b 100644
--- a/drivers/gpu/drm/imx/ipuv3/imx-tve.c
+++ b/drivers/gpu/drm/imx/ipuv3/imx-tve.c
@@ -525,6 +525,13 @@ static const struct component_ops imx_tve_ops = {
 	.bind	= imx_tve_bind,
 };
 
+static void imx_tve_put_device(void *_dev)
+{
+	struct device *dev = _dev;
+
+	put_device(dev);
+}
+
 static int imx_tve_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -546,6 +553,12 @@ static int imx_tve_probe(struct platform_device *pdev)
 	if (ddc_node) {
 		tve->ddc = of_find_i2c_adapter_by_node(ddc_node);
 		of_node_put(ddc_node);
+		if (tve->ddc) {
+			ret = devm_add_action_or_reset(dev, imx_tve_put_device,
+						       &tve->ddc->dev);
+			if (ret)
+				return ret;
+		}
 	}
 
 	tve->mode = of_get_tve_mode(np);
-- 
2.51.0