From nobody Thu Apr 2 09:45:49 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 87BD33B47C0 for ; Tue, 10 Mar 2026 12:13:48 +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=1773144830; cv=none; b=fhog5Gc2zdfwWJ5oSYqHRjJc9a/fDIXF/nbwQ5zoDT74uVcSlIVg/+uI7AZZBaqzzLzvQZ4qq1S2/HkmXIQEVwIecWtD44BYF7EclnDDO63TCmpdNRCXGCfrWZ/JleVuc0Hp2S5AEcHLt6inSQqca2KVBQqTAlJcqKmdoPo7VGk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773144830; c=relaxed/simple; bh=u8LgKOqYd/2wQk/bKimVZSnVoanddwJO8gLL/2yWdbo=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Ck1m+5phtlW0Rv8al4+7WJtokuqv90vkNB2rZafcdgL/f6go7Ghp7xr/PK7lI5vaglWaGeNs5Pt4QEK5FlJ+UDV4TQdd0iML+uTEiH72sZOmC2Kqih++wb64MDg+8jed2oAZ86Rzm+G6J+zWwsoV3nkr64mnqpmQLVMm/A9vCeY= 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=0oEUXSfQ; 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="0oEUXSfQ" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id 20DFB4E4256E; Tue, 10 Mar 2026 12:13:47 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id EAAAA60002; Tue, 10 Mar 2026 12:13:46 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id CC33310369BAD; Tue, 10 Mar 2026 13:13:42 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1773144825; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=Y1oplMH3OPrATXzqC7EfKDrsJmUbEpetqvKYhQAX6tY=; b=0oEUXSfQt28DhcP23+gkxbwwsh7xRXGZn8MlgyfaJmePp+hR4FTY5vwnl4LHCTX5vU0uLf NLOSPVGQIPuEz2Wjnw7mUqwBFtKMdwHFQV4b8zlcW+etv4jBYwgmDZiQqRa2lY2i2AO6DS uwzCzUPn+o1g/tnMk3VfAKbTC5GNgDAyB9+ZeJkz96AOKQNCcz5vPsdVNx2KIvya4tmUNS srLtbrWqEcqU0yLU8BMshMLJhzn7JXJpXuZmJssReC9pwFtS6qWPONaNnRyasbBWvjYbeR voUpYHHEKult8vtPE8cetEqRbBZnynh/sMdiL9ZqWpKROdBLJhzC2HRKDwdcSw== From: Luca Ceresoli Date: Tue, 10 Mar 2026 13:13:24 +0100 Subject: [PATCH v2 2/2] drm/bridge: samsung-dsim: use drm_bridge_clear_and_put() to put the next 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: <20260310-drm-bridge-atomic-vs-remove-clear_and_put-v2-2-51fe222f3cf0@bootlin.com> References: <20260310-drm-bridge-atomic-vs-remove-clear_and_put-v2-0-51fe222f3cf0@bootlin.com> In-Reply-To: <20260310-drm-bridge-atomic-vs-remove-clear_and_put-v2-0-51fe222f3cf0@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 , Inki Dae , Jagan Teki , Marek Szyprowski Cc: Osama Abdelkader , Hui Pu , Ian Ray , Thomas Petazzoni , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Luca Ceresoli X-Mailer: b4 0.14.3 X-Last-TLS-Session-Version: TLSv1.3 drm_bridge_clear_and_put() is simpler to write and it prevents any potential future use-after-free. Reviewed-by: Osama Abdelkader Signed-off-by: Luca Ceresoli Acked-by: Marek Szyprowski --- drivers/gpu/drm/bridge/samsung-dsim.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge= /samsung-dsim.c index ec632f268644..c3eb437ef1b0 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -1988,9 +1988,7 @@ static int samsung_dsim_host_attach(struct mipi_dsi_h= ost *host, return 0; =20 err_release_next_bridge: - drm_bridge_put(dsi->bridge.next_bridge); - dsi->bridge.next_bridge =3D NULL; - + drm_bridge_clear_and_put(&dsi->bridge.next_bridge); if (!(device->mode_flags & MIPI_DSI_MODE_VIDEO)) samsung_dsim_unregister_te_irq(dsi); err_remove_bridge: @@ -2007,8 +2005,7 @@ static int samsung_dsim_host_detach(struct mipi_dsi_h= ost *host, if (pdata->host_ops && pdata->host_ops->detach) pdata->host_ops->detach(dsi, device); =20 - drm_bridge_put(dsi->bridge.next_bridge); - dsi->bridge.next_bridge =3D NULL; + drm_bridge_clear_and_put(&dsi->bridge.next_bridge); =20 samsung_dsim_unregister_te_irq(dsi); =20 --=20 2.53.0