From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 841E4C35643 for ; Fri, 21 Feb 2020 08:05:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5BA9724670 for ; Fri, 21 Feb 2020 08:05:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582272339; bh=xhY7BV3Ql3HJ94mAkEn0dm358OpGYEaUApGgi1BxkN4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jgGl3JMD42L0Une5qaptW+kkJmciJkUkGh/tl+F7jWv5q1HzoQ7ZnTx6R5bhSQHAC N70uEILkRva/fhWECh26eqxNNQHjFHSehJ4xtQD9IrcwRn96KtcXZ7ej7ZZzuUOWR7 8bv9N/q9URjULMRHejq9bVdLfPA9KDrHBq2T4eDQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731844AbgBUIFh (ORCPT ); Fri, 21 Feb 2020 03:05:37 -0500 Received: from mail.kernel.org ([198.145.29.99]:39156 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731626AbgBUIFg (ORCPT ); Fri, 21 Feb 2020 03:05:36 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7EC8320801; Fri, 21 Feb 2020 08:05:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582272336; bh=xhY7BV3Ql3HJ94mAkEn0dm358OpGYEaUApGgi1BxkN4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Pw1Z9WHIndAUAZ4h0NchY9ZdMmZo3/MFP/qvQWs/9D9QzSpPG3w4WkL5xQlHd1Wvl 6zzcRvjOIJxnxN+81tp60YiuBJoLIGlv9KJqEhjRS0Sf34StrDtc/HdtZv1nodWkjY XTNMwK7AivRZhYpsGMhVWbN73FcLb+yWXxu2c6Ow= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Thierry Reding , Sasha Levin Subject: [PATCH 5.4 068/344] pwm: omap-dmtimer: Simplify error handling Date: Fri, 21 Feb 2020 08:37:47 +0100 Message-Id: <20200221072355.178250233@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200221072349.335551332@linuxfoundation.org> References: <20200221072349.335551332@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Uwe Kleine-König [ Upstream commit c4cf7aa57eb83b108d2d9c6c37c143388fee2a4d ] Instead of doing error handling in the middle of ->probe(), move error handling and freeing the reference to timer to the end. This fixes a resource leak as dm_timer wasn't freed when allocating *omap failed. Implementation note: The put: label was never reached without a goto and ret being unequal to 0, so the removed return statement is fine. Fixes: 6604c6556db9 ("pwm: Add PWM driver for OMAP using dual-mode timers") Signed-off-by: Uwe Kleine-König Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin --- drivers/pwm/pwm-omap-dmtimer.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c index 00772fc534906..6cfeb0e1cc679 100644 --- a/drivers/pwm/pwm-omap-dmtimer.c +++ b/drivers/pwm/pwm-omap-dmtimer.c @@ -298,15 +298,10 @@ static int pwm_omap_dmtimer_probe(struct platform_device *pdev) goto put; } -put: - of_node_put(timer); - if (ret < 0) - return ret; - omap = devm_kzalloc(&pdev->dev, sizeof(*omap), GFP_KERNEL); if (!omap) { - pdata->free(dm_timer); - return -ENOMEM; + ret = -ENOMEM; + goto err_alloc_omap; } omap->pdata = pdata; @@ -339,13 +334,28 @@ put: ret = pwmchip_add(&omap->chip); if (ret < 0) { dev_err(&pdev->dev, "failed to register PWM\n"); - omap->pdata->free(omap->dm_timer); - return ret; + goto err_pwmchip_add; } + of_node_put(timer); + platform_set_drvdata(pdev, omap); return 0; + +err_pwmchip_add: + + /* + * *omap is allocated using devm_kzalloc, + * so no free necessary here + */ +err_alloc_omap: + + pdata->free(dm_timer); +put: + of_node_put(timer); + + return ret; } static int pwm_omap_dmtimer_remove(struct platform_device *pdev) -- 2.20.1