From patchwork Mon Oct 14 02:08:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuhong Yuan X-Patchwork-Id: 59447 Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iJpo6-0000OI-M6; Mon, 14 Oct 2019 02:09:59 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729750AbfJNCJ5 (ORCPT + 1 other); Sun, 13 Oct 2019 22:09:57 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:35835 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729494AbfJNCJ4 (ORCPT ); Sun, 13 Oct 2019 22:09:56 -0400 Received: by mail-pg1-f196.google.com with SMTP id p30so9154304pgl.2; Sun, 13 Oct 2019 19:09:56 -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:mime-version :content-transfer-encoding; bh=JkHBk/oYXM6517BAgEL0tKLuS2H0cul0uF9oC7gkoSI=; b=g0CNjKkzhyTA61CsKBL3iHOy8nLVAGAa3cJ5rCVNL1BN+SBG/vzrLhjUGkRWjlW/W0 JYqfPxA6SiW5JscfbYjjGHVZCvtO2L2VsjMdTxS4Dsl4DjKC8ayzmiJQWoTbhBT7D8WE 1nvvRVtDYtCHKCeL8BGlrTZLFtoh3u5sueL5Vl/vNPFo/McUdpIRVF4gCoIpllmVEvJU HRaocmIeVyO8KOnVOBLQcUxlioZMDUmElvLXCmb9oPSEQxijkgkLsFfvDZ9jazraowWd 3/+Y2aSR5tO2k5Gk4bDv5iiQwuCl8swt9p+GtEtxsxJ+oiySHwRe6POlJwI6CIiyuq9X nAMg== 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:mime-version :content-transfer-encoding; bh=JkHBk/oYXM6517BAgEL0tKLuS2H0cul0uF9oC7gkoSI=; b=V/Eom9+6u4QGz881xwyAkKkyDHb9r9lTqrjjONf7SVjRAzMMrPeCQsv0wOUb2Ra1rg UVGLygOgDY635Kmw8gnSy7IbQvXRD6pxwbkfIHZT4cIcDns8WogQDqjwYEYOadztS6iP nPwudrp3tkM9S5LCbgt62WNJtpGCbz8rBYlBuSnV7PeTcuPQAfghU0ayIwcfh8nU1Kx1 O0jvAf8bjEPSBbkcOsi8ec5FnFYU35YqoUkRGs72WKP+baC6hR/tIWMlqIL0iW/lUXCs Su48sb5Y55dhyVpu8xHbInPfAsod9yzPClaA4+JPOxiIWHU215Lt3V3d2HaHxQ+MV4RT 0n5w== X-Gm-Message-State: APjAAAX+132Csx/k5AvVa4ZWGjgtKNBBTFuPy3Q9lRWbgNKH2R1cq9TL Y2kfUVdnbGWPO78nsXgQFgM= X-Google-Smtp-Source: APXvYqyHAW0ZGrxC+x3fqBgDGqyUuLIvlW9MkiUlzXZSZrs3uS94Jw7zBKKzmWK2wSSKmIEzfOXIOw== X-Received: by 2002:a17:90a:be09:: with SMTP id a9mr8687157pjs.5.1571018996018; Sun, 13 Oct 2019 19:09:56 -0700 (PDT) Received: from suzukaze.ipads-lab.se.sjtu.edu.cn ([89.31.126.54]) by smtp.gmail.com with ESMTPSA id q128sm16589880pga.24.2019.10.13.19.09.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Oct 2019 19:09:55 -0700 (PDT) From: Chuhong Yuan Cc: Rui Miguel Silva , Steve Longerbeam , Philipp Zabel , Mauro Carvalho Chehab , Greg Kroah-Hartman , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , linux-media@vger.kernel.org, devel@driverdev.osuosl.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Chuhong Yuan Subject: [PATCH] media: imx7-mipi-csis: Add a check for devm_regulator_get Date: Mon, 14 Oct 2019 10:08:48 +0800 Message-Id: <20191014020847.9203-1-hslester96@gmail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org devm_regulator_get may return an error but mipi_csis_phy_init misses a check for it. This may lead to problems when regulator_set_voltage uses the unchecked pointer. This patch adds a check for devm_regulator_get to avoid potential risk. Signed-off-by: Chuhong Yuan --- drivers/staging/media/imx/imx7-mipi-csis.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c index 73d8354e618c..9a07b54c4ab1 100644 --- a/drivers/staging/media/imx/imx7-mipi-csis.c +++ b/drivers/staging/media/imx/imx7-mipi-csis.c @@ -350,6 +350,8 @@ static void mipi_csis_sw_reset(struct csi_state *state) static int mipi_csis_phy_init(struct csi_state *state) { state->mipi_phy_regulator = devm_regulator_get(state->dev, "phy"); + if (IS_ERR(state->mipi_phy_regulator)) + return PTR_ERR(state->mipi_phy_regulator); return regulator_set_voltage(state->mipi_phy_regulator, 1000000, 1000000);