From nobody Mon Jun 22 20:23:10 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E914BC433F5 for ; Thu, 17 Mar 2022 06:46:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229733AbiCQGrs (ORCPT ); Thu, 17 Mar 2022 02:47:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229765AbiCQGrn (ORCPT ); Thu, 17 Mar 2022 02:47:43 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D9C4E1B53 for ; Wed, 16 Mar 2022 23:46:26 -0700 (PDT) Received: from dggeme756-chm.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4KJyLc0p2yzfYsK; Thu, 17 Mar 2022 14:44:56 +0800 (CST) Received: from huawei.com (10.175.101.6) by dggeme756-chm.china.huawei.com (10.3.19.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.21; Thu, 17 Mar 2022 14:46:24 +0800 From: Lu Wei To: , , , , CC: Subject: [PATCH] drm/panel: Fix return value check in nt35950_probe() Date: Thu, 17 Mar 2022 14:49:42 +0800 Message-ID: <20220317064942.156205-1-luwei32@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.175.101.6] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggeme756-chm.china.huawei.com (10.3.19.102) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In function nt35950_probe(), mipi_dsi_device_register_full() is called to create a MIPI DSI device. If it fails, a pointer encoded with an error will be returned, so use IS_ERR() to check the return value. Besides, use PTR_ERR to return the actual errno. Signed-off-by: Lu Wei --- drivers/gpu/drm/panel/panel-novatek-nt35950.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35950.c b/drivers/gpu/dr= m/panel/panel-novatek-nt35950.c index 288c7fa83ecc..d252e5e56228 100644 --- a/drivers/gpu/drm/panel/panel-novatek-nt35950.c +++ b/drivers/gpu/drm/panel/panel-novatek-nt35950.c @@ -579,9 +579,9 @@ static int nt35950_probe(struct mipi_dsi_device *dsi) } =20 nt->dsi[1] =3D mipi_dsi_device_register_full(dsi_r_host, info); - if (!nt->dsi[1]) { + if (IS_ERR(nt->dsi[1])) { dev_err(dev, "Cannot get secondary DSI node\n"); - return -ENODEV; + return PTR_ERR(nt->dsi[1]); } num_dsis++; } --=20 2.17.1