From nobody Fri Sep 25 04:44:23 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A8644389E1A; Wed, 16 Sep 2026 17:49:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789580969; cv=none; b=FZX7ybc6WLIv+bDmmGYH9b6mBA19jILA9rBX6iLXWuGN4mVV3d8zFXUpZ3yQhwRKzfdvhOhHmuxwFMUtHsCO9dF/EXnA/U3f3U4LW8GcQoIxC20RbPoqN2P7/U6iOO3o30Cv1f0pkFecmsQtsQOBB2dx9PZtoU/8n9AbKk9tsHE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789580969; c=relaxed/simple; bh=fuD3CdZr8I5VHiDP5SDUDPglDILp1CKYBcDBteOxMyk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=cyBq/AT7ft2CrNd896EhP2rKSK+ewbk2g27jA28Ez2PSKOoAQpeqE+WN9NERWTc8+i4hLflIJj3iw4uMzvYp+9SaEmHB60s093umTn5TM07sv5CG+gByb9aATmJcJvYWU1+LyLhIykmrK2HxIjlai0axcXmq2pGFyI+YNbQZ9bw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-05 (Coremail) with SMTP id zQCowABn0TuT1qpqQOZuCA--.23890S2; Thu, 17 Sep 2026 01:49:07 +0800 (CST) From: Wentao Liang To: airlied@gmail.com Cc: dri-devel@lists.freedesktop.org, jbrunet@baylibre.com, khilman@baylibre.com, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, martin.blumenstingl@googlemail.com, mripard@kernel.org, neil.armstrong@linaro.org, sam@ravnborg.org, simona@ffwll.ch, tzimmermann@suse.de, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] drm/meson: Fix platform device reference leak in meson_encoder_hdmi_probe() Date: Wed, 16 Sep 2026 17:48:39 +0000 Message-Id: <20260916174839.2089240-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: zQCowABn0TuT1qpqQOZuCA--.23890S2 X-Coremail-Antispam: 1UD129KBjvdXoWrZryDCFWrGr4UZF1rWw18uFg_yoWktrXEgw 10kas7ur1xKFs7Kw17ArW3uFs2yFnxuay09rsFqFWfta4rZr9rXFW7CrykXr4ava4fCayD J340gF1FgFn7KjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb-xFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26F 4UJVW0owAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv 7VC0I7IYx2IY67AKxVWUAVWUtwAv7VC2z280aVAFwI0_Cr0_Gr1UMcvjeVCFs4IE7xkEbV WUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7Cj xVA2Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4I kC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWU WwC2zVAF1VAY17CE14v26r4a6rW5MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JF I_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1lIxAIcVCF04k26cxKx2IYs7xG 6r1j6r1xMIIF0xvEx4A2jsIE14v26F4j6r4UJwCI42IY6I8E87Iv6xkF7I0E14v26F4UJV W0obIYCTnIWIevJa73UjIFyTuYvjfUw5l8UUUUU X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiDAIMA2qqpO9tdQAAsS Content-Type: text/plain; charset="utf-8" of_find_device_by_node() takes a reference on the HDMI transceiver device, but the successful probe path never releases it; the reference is only dropped when cec_notifier_conn_register() fails. The CEC notifier keeps the device as a lookup key without taking a reference of its own, so put the device right after the registration. Fixes: 0af5e0b41110 ("drm/meson: encoder_hdmi: switch to bridge DRM_BRIDGE_= ATTACH_NO_CONNECTOR") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/gpu/drm/meson/meson_encoder_hdmi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/m= eson/meson_encoder_hdmi.c index 1abb0572bb5f..8e727f0a7a8c 100644 --- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c +++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c @@ -472,6 +472,9 @@ int meson_encoder_hdmi_probe(struct meson_drm *priv) } =20 meson_encoder_hdmi->cec_notifier =3D notifier; + + /* The notifier keeps the device only as a lookup key */ + put_device(&pdev->dev); } =20 priv->encoders[MESON_ENC_HDMI] =3D meson_encoder_hdmi; --=20 2.34.1