From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16673C76186 for ; Wed, 24 Jul 2019 02:57:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA3C52190F for ; Wed, 24 Jul 2019 02:57:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="k5ugUzpE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726108AbfGXC5C (ORCPT ); Tue, 23 Jul 2019 22:57:02 -0400 Received: from mail-io1-f67.google.com ([209.85.166.67]:41915 "EHLO mail-io1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725848AbfGXC5C (ORCPT ); Tue, 23 Jul 2019 22:57:02 -0400 Received: by mail-io1-f67.google.com with SMTP id j5so82208247ioj.8 for ; Tue, 23 Jul 2019 19:57:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=9LuYZGeTTRh9jWydJ51h+aLs5iCAt31ogMM0zlo+joQ=; b=k5ugUzpElphl/a1Ru+wxJ/t788bj7DWn4ZtCOF7bjTxCVc2E912sOW11VOsK20Px+n CRtHDYholNFHeKhZbkBvXxT1j14Nz4YVXf5bog2+l4e60PhFeLd4D965SaRyuk04mIJ7 UXFKYjp8yx4OBEUsbAq5NyjhYRM6QZV6RWEdTNkZFAsxDY20FNDgQKJmoDu09kMuB9y9 LcgDyn3/AJhiQrq32/frrZiVUt3Kkpmv+i5cfwdKd84/U4/4Wpsgx25iyko5HcsNJ+In Tp5t1BSIU0Xa6FjWIx7F6vtVu5pWgIlEUSCoigYQRr3bLGAKScXZNs/ayCpywo5PSZ3H 3L1w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=9LuYZGeTTRh9jWydJ51h+aLs5iCAt31ogMM0zlo+joQ=; b=SpXuH/6NHW1kxl1+x/Pw0FNQubJX5xrvct6u8jr2P8NpWy6avdpYH7nhcpc3LbHMgo K8n3D0OlFNsgny+1JxQjXwhvHmkrv6dhLR+m9Hm9VqduSejRpfLWcAtXL3/LB2jGoIC+ oMPckEE3qnjQFAM93rg+fcytW8/XMRpPNHHjbrdUNMk7kG+PfuSYnVnu7dIhIRBrTJ21 t+gSYG6LoLm0ogqb0YDajMV7X7floHX1z3qXZaqIf4lXmp1jO+aw51cHzdwHnRcqo/ys GDSjUQ3IkAZD4QrPIY6mQJZnMsSjvnmZweNWYyHUjn+jeQxmV9BrOAmW2SSm3tIqafQz g2eA== X-Gm-Message-State: APjAAAVTkxQiLXiuRb0ISYYB9geW9cfb57WC+6bstFlmBOTLt6iuGUHi FGMRJwCxCpzRfQunUsD8x8M= X-Google-Smtp-Source: APXvYqxeOFjGHKvmnyj7si7F3C+wNy21FAYf7FWnUifFXE3BDOY54y6bzL7+qggxsL0/SbVhzf8hHg== X-Received: by 2002:a05:6638:201:: with SMTP id e1mr3127273jaq.45.1563937021448; Tue, 23 Jul 2019 19:57:01 -0700 (PDT) Received: from cs-dulles.cs.umn.edu (cs-dulles.cs.umn.edu. [128.101.35.54]) by smtp.googlemail.com with ESMTPSA id 20sm49019979iog.62.2019.07.23.19.56.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 23 Jul 2019 19:57:00 -0700 (PDT) From: Navid Emamdoost To: emamd001@umn.edu Cc: kjlu@umn.edu, smccaman@umn.edu, Navid Emamdoost , Thierry Reding , Sam Ravnborg , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] rpi_touchscreen_probe: check for failure case Date: Tue, 23 Jul 2019 21:56:43 -0500 Message-Id: <20190724025644.17163-1-navid.emamdoost@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org of_graph_get_next_endpoint may return NULL, so null check is needed. Signed-off-by: Navid Emamdoost --- drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c index 28c0620dfe0f..2e0977e26fab 100644 --- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c +++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c @@ -399,6 +399,8 @@ static int rpi_touchscreen_probe(struct i2c_client *i2c, /* Look up the DSI host. It needs to probe before we do. */ endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); + if (!endpoint) + return -ENODEV; dsi_host_node = of_graph_get_remote_port_parent(endpoint); host = of_find_mipi_dsi_host_by_node(dsi_host_node); of_node_put(dsi_host_node); -- 2.17.1