From patchwork Fri Aug 21 08:15:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dinghao Liu X-Patchwork-Id: 11728595 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 1E344739 for ; Fri, 21 Aug 2020 08:15:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E6F220639 for ; Fri, 21 Aug 2020 08:15:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727101AbgHUIPi (ORCPT ); Fri, 21 Aug 2020 04:15:38 -0400 Received: from spam.zju.edu.cn ([61.164.42.155]:17530 "EHLO zju.edu.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725965AbgHUIPi (ORCPT ); Fri, 21 Aug 2020 04:15:38 -0400 Received: by ajax-webmail-mail-app3 (Coremail) ; Fri, 21 Aug 2020 16:15:13 +0800 (GMT+08:00) X-Originating-IP: [10.192.85.18] Date: Fri, 21 Aug 2020 16:15:13 +0800 (GMT+08:00) X-CM-HeaderCharset: UTF-8 From: dinghao.liu@zju.edu.cn To: dinghao.liu@zju.edu.cn, kjlu@umn.edu Cc: "Gilad Ben-Yossef" , "Herbert Xu" , "David S. Miller" , "Geert Uytterhoeven" , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] crypto: ccree - fix runtime PM imbalance on error X-Priority: 3 X-Mailer: Coremail Webmail Server Version XT5.0.12 build 20200616(0f5d8152) Copyright (c) 2002-2020 www.mailtech.cn zju.edu.cn MIME-Version: 1.0 Message-ID: <5fe48e8a.e845.1741016074a.Coremail.dinghao.liu@zju.edu.cn> X-Coremail-Locale: zh_CN X-CM-TRANSID: cC_KCgBH_96Rgj9fyzj9Ag--.45498W X-CM-SenderInfo: qrrzjiaqtzq6lmxovvfxof0/1tbiAgoSBlZdtPnBhAAns4 X-Coremail-Antispam: 1Ur529EdanIXcx71UUUUU7IcSsGvfJTRUUUbAIS07vEb7Iv0x C_Cr1lV2xY67kC6x804xWlV2xY67CY07I20VC2zVCF04k26cxKx2IYs7xG6rWj6s0DMIAI bVAFxVCF77xC64kEw24lV2xY67C26IkvcIIF6IxKo4kEV4ylV2xY628lY4IE4IxF12IF4w CS07vE84x0c7CEj48ve4kI8wCS07vE84ACjcxK6xIIjxv20xvE14v26w1j6s0DMIAIbVA2 z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UMIAIbVA2z4x0Y4vEx4A2jsIE14v26r xl6s0DMIAIbVA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s1lV2xY62AIxVAIcxkEcVAq 07x20xvEncxIr21lV2xY6c02F40EFcxC0VAKzVAqx4xG6I80ewCS07vEYx0E2Ix0cI8IcV AFwI0_JrI_JrylV2xY6cIj6I8E87Iv67AKxVWUJVW8JwCS07vEOx8S6xCaFVCjc4AY6r1j 6r4UMIAIbVACjI8F5VA0II8E6IAqYI8I648v4I1lV2xY6x02cVAKzwCS07vEc2IjII80xc xEwVAKI48JMIAIbVCF04k20xvE74AGY7Cv6cx26r4fKr1UJr1lV2xY6xCjnVCjjxCrMIAI bVCFx2IqxVCFs4IE7xkEbVWUJVW8JwCS07vEx2IqxVAqx4xG67AKxVWUJVWUGwCS07vEx2 IqxVCjr7xvwVAFwI0_JrI_JrWlV2xY6I8E67AF67kF1VAFwI0_Jw0_GFylV2xY6IIF0xvE 2Ix0cI8IcVAFwI0_Jr0_JF4lV2xY6IIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCS07 vEIxAIcVCF04k26cxKx2IYs7xG6Fyj6rWUJwCS07vEIxAIcVC2z280aVAFwI0_Jr0_Gr1l V2xY6IIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU= Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org pm_runtime_get_sync() increments the runtime PM usage counter even when it returns an error code. However, users of cc_pm_get(), a direct wrapper of pm_runtime_get_sync(), assume that PM usage counter will not change on error. Thus a pairing decrement is needed on the error handling path to keep the counter balanced. Fixes: 8c7849a30255c ("crypto: ccree - simplify Runtime PM handling") Signed-off-by: Dinghao Liu --- drivers/crypto/ccree/cc_pm.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/ccree/cc_pm.c b/drivers/crypto/ccree/cc_pm.c index d39e1664fc7e..3c65bf070c90 100644 --- a/drivers/crypto/ccree/cc_pm.c +++ b/drivers/crypto/ccree/cc_pm.c @@ -65,8 +65,12 @@ const struct dev_pm_ops ccree_pm = { int cc_pm_get(struct device *dev) { int rc = pm_runtime_get_sync(dev); + if (rc < 0) { + pm_runtime_put_noidle(dev); + return rc; + } - return (rc == 1 ? 0 : rc); + return 0; } void cc_pm_put_suspend(struct device *dev)