Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Alban Bedel <albeu@free.fr>
To:     Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc:     linux-kernel@vger.kernel.org, Alban Bedel <albeu@free.fr>
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>
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

__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 <albeu@free.fr>
---
 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