From patchwork Tue Apr 18 05:38:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Zhang X-Patchwork-Id: 675743 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 EC495C77B75 for ; Tue, 18 Apr 2023 05:39:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229669AbjDRFjO (ORCPT ); Tue, 18 Apr 2023 01:39:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229518AbjDRFjO (ORCPT ); Tue, 18 Apr 2023 01:39:14 -0400 Received: from hust.edu.cn (unknown [202.114.0.240]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6EC64EEB; Mon, 17 Apr 2023 22:39:12 -0700 (PDT) Received: from van1shing-pc.localdomain ([10.12.182.0]) (user=silver_code@hust.edu.cn mech=LOGIN bits=0) by mx1.hust.edu.cn with ESMTP id 33I5cFvC014772-33I5cFvD014772 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 18 Apr 2023 13:38:35 +0800 From: Wang Zhang To: Peter Korsgaard , Andrew Lunn Cc: hust-os-kernel-patches@googlegroups.com, Wang Zhang , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3] i2c: ocores: add missing unwind goto in `ocores_i2c_probe` Date: Tue, 18 Apr 2023 13:38:13 +0800 Message-Id: <20230418053814.117215-1-silver_code@hust.edu.cn> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-FEAS-AUTH-USER: silver_code@hust.edu.cn Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Smatch Warns: drivers/i2c/busses/i2c-ocores.c:701 ocores_i2c_probe() warn: missing unwind goto? The error handling code after the err_clk label should be executed to release any resources that were allocated for the clock if a negative error code returned after platform_get_irq_optional. Fix this by changing the direct return to `goto err_clk`. Signed-off-by: Wang Zhang --- v2->v3: the first patch had issues. Just do a much simpler fix. No need to add the check. clk_disable_unprepare() has checks for error pointer and NULL already. v1->v2: change `ocores_i2c_of_probe` to use `devm_clk_get_enabled()` --- This patch was found by static analyzer. ... drivers/i2c/busses/i2c-ocores.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c index 2e575856c5cd..1df1439218c9 100644 --- a/drivers/i2c/busses/i2c-ocores.c +++ b/drivers/i2c/busses/i2c-ocores.c @@ -700,8 +700,10 @@ static int ocores_i2c_probe(struct platform_device *pdev) if (irq == -ENXIO) { ocores_algorithm.master_xfer = ocores_xfer_polling; } else { - if (irq < 0) - return irq; + if (irq < 0) { + ret = irq; + goto err_clk; + } } if (ocores_algorithm.master_xfer != ocores_xfer_polling) {