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=-9.0 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 BD916C43387 for ; Sun, 6 Jan 2019 19:29:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8F48220859 for ; Sun, 6 Jan 2019 19:29:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726487AbfAFT3R (ORCPT ); Sun, 6 Jan 2019 14:29:17 -0500 Received: from smtp3-g21.free.fr ([212.27.42.3]:36057 "EHLO smtp3-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726050AbfAFT3R (ORCPT ); Sun, 6 Jan 2019 14:29:17 -0500 Received: from localhost.localdomain (unknown [IPv6:2a02:8108:4840:8f74:143e:fcd5:beb7:2140]) (Authenticated sender: albeu) by smtp3-g21.free.fr (Postfix) with ESMTPA id A213813F879; Sun, 6 Jan 2019 20:29:09 +0100 (CET) From: Alban Bedel To: Srinivas Kandagatla Cc: linux-kernel@vger.kernel.org, Alban Bedel Subject: [PATCH 7/8] nvmem: core: Fix device reference leak Date: Sun, 6 Jan 2019 20:28:19 +0100 Message-Id: <20190106192820.12558-8-albeu@free.fr> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190106192820.12558-1-albeu@free.fr> References: <20190106192820.12558-1-albeu@free.fr> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org __nvmem_device_get() make use of bus_find_device() to get the relevant device and this function increase the reference count of the device found, however this is not accounted for anywhere. Fix __nvmem_device_get() and __nvmem_device_put() to properly release this reference count. Signed-off-by: Alban Bedel --- drivers/nvmem/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 2fa97b373601..176fe72f4eb5 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -811,6 +811,7 @@ static struct nvmem_device *__nvmem_device_get(struct device_node *np, "could not increase module refcount for cell %s\n", nvmem_dev_name(nvmem)); + put_device(&nvmem->dev); return ERR_PTR(-EINVAL); } @@ -821,6 +822,7 @@ static struct nvmem_device *__nvmem_device_get(struct device_node *np, static void __nvmem_device_put(struct nvmem_device *nvmem) { + put_device(&nvmem->dev); module_put(nvmem->owner); kref_put(&nvmem->refcnt, nvmem_device_release); } -- 2.19.1