From patchwork Sat Dec 12 16:06:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 11970131 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 F37C2C4167B for ; Sat, 12 Dec 2020 16:08:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CA8AB23121 for ; Sat, 12 Dec 2020 16:08:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393719AbgLLQIP (ORCPT ); Sat, 12 Dec 2020 11:08:15 -0500 Received: from smtp06.smtpout.orange.fr ([80.12.242.128]:35625 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726366AbgLLQIA (ORCPT ); Sat, 12 Dec 2020 11:08:00 -0500 Received: from localhost.localdomain ([93.22.36.60]) by mwinf5d29 with ME id 3U6E240181HrHD103U6Efl; Sat, 12 Dec 2020 17:06:16 +0100 X-ME-Helo: localhost.localdomain X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Sat, 12 Dec 2020 17:06:16 +0100 X-ME-IP: 93.22.36.60 From: Christophe JAILLET To: leoyang.li@nxp.com, zw@zh-kernel.org, vkoul@kernel.org, dan.j.williams@intel.com, iws@ovro.caltech.edu Cc: linuxppc-dev@lists.ozlabs.org, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET Subject: [PATCH 2/2] dmaengine: fsldma: Fix a resource leak in an error handling path of the probe function Date: Sat, 12 Dec 2020 17:06:14 +0100 Message-Id: <20201212160614.92576-1-christophe.jaillet@wanadoo.fr> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org In case of error, the previous 'fsl_dma_chan_probe()' calls must be undone by some 'fsl_dma_chan_remove()', as already done in the remove function. It was added in the remove function in commit 77cd62e8082b ("fsldma: allow Freescale Elo DMA driver to be compiled as a module") Fixes: d3f620b2c4fe ("fsldma: simplify IRQ probing and handling") Signed-off-by: Christophe JAILLET --- Patch provided as-is. I don't have the configuration to compile test this patch --- drivers/dma/fsldma.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index 554f70a0c18c..f8459cc5315d 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -1214,6 +1214,7 @@ static int fsldma_of_probe(struct platform_device *op) { struct fsldma_device *fdev; struct device_node *child; + unsigned int i; int err; fdev = kzalloc(sizeof(*fdev), GFP_KERNEL); @@ -1292,6 +1293,10 @@ static int fsldma_of_probe(struct platform_device *op) return 0; out_free_fdev: + for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) { + if (fdev->chan[i]) + fsl_dma_chan_remove(fdev->chan[i]); + } irq_dispose_mapping(fdev->irq); iounmap(fdev->regs); out_free: