From patchwork Thu Apr 8 07:18:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liu Shixin X-Patchwork-Id: 418322 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, 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 223C2C433ED for ; Thu, 8 Apr 2021 07:19:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA4E861182 for ; Thu, 8 Apr 2021 07:19:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230239AbhDHHTb (ORCPT ); Thu, 8 Apr 2021 03:19:31 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:16080 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229775AbhDHHTa (ORCPT ); Thu, 8 Apr 2021 03:19:30 -0400 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FGCJ271Msz1BGFm; Thu, 8 Apr 2021 15:17:06 +0800 (CST) Received: from huawei.com (10.175.113.32) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.498.0; Thu, 8 Apr 2021 15:19:08 +0800 From: Shixin Liu To: Herbert Xu , "David S. Miller" , Maxime Coquelin , "Alexandre Torgue" CC: , , , , Shixin Liu Subject: [PATCH -next 4/7] crypto: stm32/hash - Fix PM reference leak on stm32-hash.c Date: Thu, 8 Apr 2021 15:18:35 +0800 Message-ID: <20210408071835.836791-1-liushixin2@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.175.113.32] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. Fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Signed-off-by: Shixin Liu --- drivers/crypto/stm32/stm32-hash.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c index 7ac0573ef663..389de9e3302d 100644 --- a/drivers/crypto/stm32/stm32-hash.c +++ b/drivers/crypto/stm32/stm32-hash.c @@ -813,7 +813,7 @@ static void stm32_hash_finish_req(struct ahash_request *req, int err) static int stm32_hash_hw_init(struct stm32_hash_dev *hdev, struct stm32_hash_request_ctx *rctx) { - pm_runtime_get_sync(hdev->dev); + pm_runtime_resume_and_get(hdev->dev); if (!(HASH_FLAGS_INIT & hdev->flags)) { stm32_hash_write(hdev, HASH_CR, HASH_CR_INIT); @@ -962,7 +962,7 @@ static int stm32_hash_export(struct ahash_request *req, void *out) u32 *preg; unsigned int i; - pm_runtime_get_sync(hdev->dev); + pm_runtime_resume_and_get(hdev->dev); while ((stm32_hash_read(hdev, HASH_SR) & HASH_SR_BUSY)) cpu_relax(); @@ -1000,7 +1000,7 @@ static int stm32_hash_import(struct ahash_request *req, const void *in) preg = rctx->hw_context; - pm_runtime_get_sync(hdev->dev); + pm_runtime_resume_and_get(hdev->dev); stm32_hash_write(hdev, HASH_IMR, *preg++); stm32_hash_write(hdev, HASH_STR, *preg++); @@ -1566,7 +1566,7 @@ static int stm32_hash_remove(struct platform_device *pdev) if (!hdev) return -ENODEV; - ret = pm_runtime_get_sync(hdev->dev); + ret = pm_runtime_resume_and_get(hdev->dev); if (ret < 0) return ret;