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: 10380521 X-Patchwork-Delegate: geert@linux-m68k.org 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 974BD603B4 for ; Fri, 4 May 2018 13:54:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7A1C529455 for ; Fri, 4 May 2018 13:54:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6DD9829453; Fri, 4 May 2018 13:54:51 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1F85E29453 for ; 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Fri, 4 May 2018 13:53:45 +0000 From: Peter Rosin To: linux-kernel@vger.kernel.org Cc: Peter Rosin , Archit Taneja , Andrzej Hajda , Laurent Pinchart , David Airlie , Peter Senna Tschudin , Martin Donnelly , Martyn Welch , Gustavo Padovan , Maarten Lankhorst , Sean Paul , Inki Dae , Joonyoung Shim , Seung-Woo Kim , Kyungmin Park , Kukjin Kim , Krzysztof Kozlowski , CK Hu , Philipp Zabel , Matthias Brugger , Rob Clark , Sandy Huang , =?UTF-8?q?Heiko=20St=C3=BCbner?= , Benjamin Gaignard , Vincent Abriou , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, Jyri Sarha , Daniel Vetter 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:; 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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;