From patchwork Mon Sep 30 20:52:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Navid Emamdoost X-Patchwork-Id: 11167461 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AA2E8912 for ; Mon, 30 Sep 2019 20:52:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 88AE5224FE for ; Mon, 30 Sep 2019 20:52:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="A5mKEowm" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727188AbfI3Uw5 (ORCPT ); Mon, 30 Sep 2019 16:52:57 -0400 Received: from mail-io1-f66.google.com ([209.85.166.66]:39209 "EHLO mail-io1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727118AbfI3Uw4 (ORCPT ); Mon, 30 Sep 2019 16:52:56 -0400 Received: by mail-io1-f66.google.com with SMTP id a1so42048611ioc.6; Mon, 30 Sep 2019 13:52:56 -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:in-reply-to:references; bh=HjzHBo6jT8sEvFe44LiFogaEnhJkNVFYB6XfDK7uqQ0=; b=A5mKEowmZmV++Op18zcmJR3/GH2ctiZffg/i22VkQ7tFE1c7sw8wb4oksQ6pjn3XGV 5NNGCwG3fx94axiNRlb/VLkqyNoXfylZgasulxkQJrbm9qKbbQCkBjlrh0iMKg2P3r0F GeQwWcGXonOk1I4Yb+8/dLT2Tvc5iIEdRRsB4vdCrnG7/yKwQMcuJ1uYRFcTqE87ZqX9 VK2VLqGyvoS8iYb/I0DuzebaEOcC8Mycb9iqKQqRkq/SPUpntj0ZppnWmgakX5zSZtJ3 bLO+GoHmL8/1sqO/MLLtTUgjW07uDgE3N0nEeY8ZfwQBHvtkQ0xP8HGVt7kUjg3BeV0g mpoA== 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:in-reply-to :references; bh=HjzHBo6jT8sEvFe44LiFogaEnhJkNVFYB6XfDK7uqQ0=; b=NcI6YA1affjO3DXITMbGWBoAJI+AaU4e5kWYImGuBfffek5czLnqy/Ceu5MCi63IBe AcXkrEDgDsTdcG/AmZK07jIhvLcSlcC87yMO8SabBmOelJye0QYXfcfYyZjes7vn4UBL EjKXJ/xjvqtE0IEYFlzAvxO7ttBmOAA7gyU+3LQpXrQ65PAmUBYPcrhoYVlFl8VnZYN/ st0Aq1rjca5R8P5bYPt+awTT686f/fh9LOMnHa34SZpZRVH3LkqWx4pGZO10XvHzBseV FDRiJ3XGzvuiGUKs7dqtHrVxYdG2j1IcFLCnJWhOycAawxjn3d4pJ9hMpZV31epot0AT MhkQ== X-Gm-Message-State: APjAAAVVkEMWOS4X5aP1Y5lokmSB24Y+ZsgkzNWCChNsQkqy3E/VCcY9 Gv7MS/mz1JFYqknhMgjElwc= X-Google-Smtp-Source: APXvYqzn/RTz90DQPs3v6GoRB75cFXIoD+MRJM6af30g7CqSFxkRz2+0cOy/I6rraDzMF6BGC8+FQw== X-Received: by 2002:a92:b612:: with SMTP id s18mr19955089ili.37.1569876776114; Mon, 30 Sep 2019 13:52:56 -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 g4sm6979666iof.56.2019.09.30.13.52.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Sep 2019 13:52:55 -0700 (PDT) From: Navid Emamdoost Cc: emamd001@umn.edu, smccaman@umn.edu, kjlu@umn.edu, Navid Emamdoost , Mark Brown , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] spi: gpio: prevent memory leak in spi_gpio_probe Date: Mon, 30 Sep 2019 15:52:40 -0500 Message-Id: <20190930205241.5483-1-navid.emamdoost@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: To: unlisted-recipients:; (no To-header on input) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org In spi_gpio_probe an SPI master is allocated via spi_alloc_master, but this controller should be released if devm_add_action_or_reset fails, otherwise memory leaks. In order to avoid leak spi_contriller_put must be called in case of failure for devm_add_action_or_reset. Fixes: 8b797490b4db ("spi: gpio: Make sure spi_master_put() is called in every error path") Signed-off-by: Navid Emamdoost --- Changes in v2: -- fix a typo in title and update the description --- drivers/spi/spi-gpio.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c index 1d3e23ec20a6..f9c5bbb74714 100644 --- a/drivers/spi/spi-gpio.c +++ b/drivers/spi/spi-gpio.c @@ -371,8 +371,10 @@ static int spi_gpio_probe(struct platform_device *pdev) return -ENOMEM; status = devm_add_action_or_reset(&pdev->dev, spi_gpio_put, master); - if (status) + if (status) { + spi_master_put(master); return status; + } if (of_id) status = spi_gpio_probe_dt(pdev, master);