From patchwork Fri May 4 13:52:11 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Rosin X-Patchwork-Id: 10382347 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4DC8D60159 for ; Sat, 5 May 2018 20:12:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3EAB128917 for ; Sat, 5 May 2018 20:12:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 32F5C28A3B; Sat, 5 May 2018 20:12:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.1 required=2.0 tests=BAD_ENC_HEADER,BAYES_00, DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DDBE228917 for ; 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Fri, 4 May 2018 13:53:45 +0000 From: Peter Rosin To: linux-kernel@vger.kernel.org Subject: [PATCH v2 25/26] drm/bridge: require the owner .odev to be filled in on drm_bridge_add/attach Date: Fri, 4 May 2018 15:52:11 +0200 Message-Id: <20180504135212.26977-26-peda@axentia.se> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180504135212.26977-1-peda@axentia.se> References: <20180504135212.26977-1-peda@axentia.se> MIME-Version: 1.0 X-Originating-IP: [85.226.244.23] X-ClientProxiedBy: DB6PR0202CA0039.eurprd02.prod.outlook.com (2603:10a6:4:a5::25) To AM4PR0202MB2769.eurprd02.prod.outlook.com (2603:10a6:200:8c::19) X-MS-PublicTrafficType: Email X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652020)(7021125)(5600026)(4534165)(7022125)(4603075)(4627221)(201702281549075)(7048125)(7024125)(7027125)(7028125)(7023125)(2017052603328)(7153060)(7193020); SRVR:AM4PR0202MB2769; X-Microsoft-Exchange-Diagnostics: 1; AM4PR0202MB2769; 3:uVpej3n/jhcFWhTGLC5sScv2xdApvjB/xIEeIumpR56ZH9N7V+oeGmSGML15BhWvYpN7/OrHYN2w8BE6wDhCC76oJlSxOcwO531fqoyX+IbdyDuCv5YH2Sf9e388wSxsJOyMqv3u+/ws1IxKfpb3/1SEIFBv3/NXJ5yNRXhAPqxvKbnAc1zqy5RgZa6Yhka8zKz10rOWu/60OeZCB5m5xJMPrxPV4RG/UER8l/lqtWeP6MjjoVwWx/jXV5/awNAF; 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Signed-off-by: Peter Rosin Reviewed-by: Andrzej Hajda --- drivers/gpu/drm/drm_bridge.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index df084db33494..78d186b6831b 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -70,6 +70,9 @@ static LIST_HEAD(bridge_list); */ void drm_bridge_add(struct drm_bridge *bridge) { + if (WARN_ON(!bridge->odev)) + return; + mutex_lock(&bridge_lock); list_add_tail(&bridge->list, &bridge_list); mutex_unlock(&bridge_lock); @@ -115,6 +118,9 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge, if (!encoder || !bridge) return -EINVAL; + if (WARN_ON(!bridge->odev)) + return -EINVAL; + if (previous && (!previous->dev || previous->encoder != encoder)) return -EINVAL;