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(unknown [61.154.14.86]) by smtp.qiye.163.com (Hmail) with ESMTP id 408ded083; Mon, 1 Jun 2026 14:51:12 +0800 (GMT+08:00) From: Damon Ding To: hjc@rock-chips.com, heiko@sntech.de, andy.yan@rock-chips.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org Cc: Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, nicolas.frattaroli@collabora.com, cristian.ciocaltea@collabora.com, sebastian.reichel@collabora.com, dmitry.baryshkov@oss.qualcomm.com, luca.ceresoli@bootlin.com, dianders@chromium.org, m.szyprowski@samsung.com, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, Damon Ding Subject: [PATCH v10 06/11] drm/rockchip: analogix_dp: Fix OF node reference leak via auto cleanup Date: Mon, 1 Jun 2026 14:50:55 +0800 Message-Id: <20260601065100.1103873-7-damon.ding@rock-chips.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260601065100.1103873-1-damon.ding@rock-chips.com> References: <20260601065100.1103873-1-damon.ding@rock-chips.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Tid: 0a9e81f363b403a8kunm111da268257e31 X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVlCTBhDVk9LH0JLGBkfTUxNSVYVFA kWGhdVEwETFhoSFyQUDg9ZV1kYEgtZQVlNSlVKTk9VSk9VQ01ZV1kWGg8SFR0UWUFZT0tIVUpLSE pKQk1VSktLVUpCWQY+ DKIM-Signature: a=rsa-sha256; b=deFm5InC/687QsO2wD9nxR5fYYZQR36H5WyR7KJF0KeTUyaPkU8STH2VQz9pvWnj+2TE+JLIUqml7W+sBG58qJPg7nIH26eVRdsz0uOZkpOrBsfWXBoefa1qhQuMveCPVho4oNMRF65guiFZTdh8hDTp8lOke0EzfjvWwkH81kY=; c=relaxed/relaxed; s=default; d=rock-chips.com; v=1; bh=yJZuY68i6MDKTHNn2ykBZ5f5HU1REKA2FFFIWObwSW8=; h=date:mime-version:subject:message-id:from; Sashiko reported a reference leak in rockchip_dp_drm_encoder_enable(), the of_get_child_by_name() function does not call of_node_put() in a symmetrical way [1]. Fix the device node reference leak by using __free(device_node) to automatically manage of_node_put() for all device nodes. Fixes: 729f8eefdcad ("drm/rockchip: analogix_dp: Add support for RK3588") Link: https://sashiko.dev/#/patchset/20260527024336.191433-1-damon.ding@rock-chips.com?part=5 #1 Signed-off-by: Damon Ding --- drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index d2af5eb29dbb..b1ed25cefe5e 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -8,6 +8,7 @@ * Jeff Chen */ +#include #include #include #include @@ -206,7 +207,6 @@ static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder, struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state; struct of_endpoint endpoint; - struct device_node *remote_port, *remote_port_parent; char name[32]; u32 port_id; int ret; @@ -230,18 +230,22 @@ static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder, if (ret < 0) return; - remote_port_parent = of_graph_get_remote_port_parent(endpoint.local_node); + struct device_node *remote_port_parent __free(device_node) = + of_graph_get_remote_port_parent(endpoint.local_node); if (remote_port_parent) { - if (of_get_child_by_name(remote_port_parent, "ports")) { - remote_port = of_graph_get_remote_port(endpoint.local_node); + struct device_node *ports __free(device_node) = + of_get_child_by_name(remote_port_parent, "ports"); + + if (ports) { + struct device_node *remote_port __free(device_node) = + of_graph_get_remote_port(endpoint.local_node); + of_property_read_u32(remote_port, "reg", &port_id); - of_node_put(remote_port); sprintf(name, "%s vp%d", remote_port_parent->full_name, port_id); } else { sprintf(name, "%s %s", remote_port_parent->full_name, endpoint.id ? "vopl" : "vopb"); } - of_node_put(remote_port_parent); DRM_DEV_DEBUG(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG"); } -- 2.34.1