From nobody Tue Feb 10 06:25:59 2026 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3A2CD379962; Wed, 7 Jan 2026 16:22:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.85.4 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767802964; cv=none; b=vA/DGLEhxBkglhOHZTSO4SLSF2/e3jPfX6fOhqPq1uQOEp6c1Y/i3eqoTcsgWPqMHxI2Tb29Kc4cZbhoT27Enm5v3g79zTCFmTLfamdDUyzhqQypw5NV+SRTTYFv99aI5Ot5g2iW30ZHykNDlzbdiRTKDHe70wizjeVckOiMRs4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767802964; c=relaxed/simple; bh=0WnxvGR7dNcQV8FWGN9plU+h4WhCklUUdW0/lgwyyHY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=TkpuinPTPpOeT1cqosrVYld0Hs+PkkzsxytSdfneBUAkcfK6Lug0z6b0RoBwPhLbZOdTnwgWVWYJsUI0sb47qSoyLUAkFiYa7vH60UJG6IysQmaufIYweydrwi54KDMiGr//CV7sGhn/L+H2esGqqBqo0nfiyFN3+Es0rjanLdU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=bzDLu4ho; arc=none smtp.client-ip=185.246.85.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="bzDLu4ho" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id F230F4E41FE1; Wed, 7 Jan 2026 16:22:29 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id BDBE56072B; Wed, 7 Jan 2026 16:22:29 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 5DAA0103C87C7; Wed, 7 Jan 2026 17:22:23 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1767802948; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=qkiR0P62QEUb1PCOEii1nVoSK2mCmCTz+ERz0qbz4sk=; b=bzDLu4hog3Yzapu+FCJaa75iEPEgDSakBa2bewsdNrO75fp1ds4LOGxHwDe7EK4GeGSQhJ l9ijvmCRCnj+9qfTD2679M1ipP3NBnXdgBMYGAud8sUuPBztTSS+Cs1CzC/w1APFIhguw8 V2WVK0uZU8nZ2/mgFTNxxwsnxzVPsYW7MrWu7TF42BAOtRrvqPMjwj8VDRGYA9H6hzDBMd ORN05jWhnTBgKBmXhTqTHtMlUCsTzAKGn9EN/JdOOHv1Bcpu4h8PJJzxGuJOmMyswQZtLO X3PdwDEEQe+ZgynJ6865m0cZAIlwFoPQYmii3B/XEmsWX+WIc301Hkj56NUGNg== From: Luca Ceresoli Date: Wed, 07 Jan 2026 17:22:00 +0100 Subject: [PATCH 2/6] drm/meson/dw-hdmi: convert to of_drm_find_and_get_bridge() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260107-drm-bridge-alloc-getput-drm_of_find_bridge-3-v1-2-ef48a517828e@bootlin.com> References: <20260107-drm-bridge-alloc-getput-drm_of_find_bridge-3-v1-0-ef48a517828e@bootlin.com> In-Reply-To: <20260107-drm-bridge-alloc-getput-drm_of_find_bridge-3-v1-0-ef48a517828e@bootlin.com> To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Philipp Zabel , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Chun-Kuang Hu , Matthias Brugger , AngeloGioacchino Del Regno , Inki Dae , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Alim Akhtar , Laurent Pinchart , Tomi Valkeinen , Kieran Bingham , Geert Uytterhoeven , Magnus Damm Cc: Hui Pu , Thomas Petazzoni , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev, linux-mediatek@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Luca Ceresoli X-Mailer: b4 0.14.3 X-Last-TLS-Session-Version: TLSv1.3 of_drm_find_bridge() is deprecated. Move to its replacement of_drm_find_and_get_bridge() which gets a bridge reference, and ensure it is put when done. dw_hdmi->bridge is used only in dw_hdmi_top_thread_irq(), so in order to avoid potential use-after-free ensure the irq is freed before putting the dw_hdmi->bridge reference. Signed-off-by: Luca Ceresoli Acked-by: Maxime Ripard --- drivers/gpu/drm/meson/meson_dw_hdmi.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/= meson_dw_hdmi.c index 0d7c68b29dff..fef1702acb14 100644 --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c @@ -778,7 +778,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struc= t device *master, if (IS_ERR(meson_dw_hdmi->hdmi)) return PTR_ERR(meson_dw_hdmi->hdmi); =20 - meson_dw_hdmi->bridge =3D of_drm_find_bridge(pdev->dev.of_node); + meson_dw_hdmi->bridge =3D of_drm_find_and_get_bridge(pdev->dev.of_node); =20 DRM_DEBUG_DRIVER("HDMI controller initialized\n"); =20 @@ -789,8 +789,12 @@ static void meson_dw_hdmi_unbind(struct device *dev, s= truct device *master, void *data) { struct meson_dw_hdmi *meson_dw_hdmi =3D dev_get_drvdata(dev); + struct platform_device *pdev =3D to_platform_device(dev); + int irq =3D platform_get_irq(pdev, 0); =20 + devm_free_irq(dev, irq, meson_dw_hdmi); dw_hdmi_unbind(meson_dw_hdmi->hdmi); + drm_bridge_put(meson_dw_hdmi->bridge); } =20 static const struct component_ops meson_dw_hdmi_ops =3D { --=20 2.52.0