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From:   Bartosz Golaszewski <brgl@bgdev.pl>
To:     Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        "David S . Miller" <davem@davemloft.net>,
        Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Jonathan Corbet <corbet@lwn.net>, Sekhar Nori <nsekhar@ti.com>,
        Kevin Hilman <khilman@kernel.org>,
        David Lechner <david@lechnology.com>,
        Boris Brezillon <boris.brezillon@bootlin.com>,
        Andrew Lunn <andrew@lunn.ch>, Alban Bedel <albeu@free.fr>,
        Maxime Ripard <maxime.ripard@bootlin.com>,
        Chen-Yu Tsai <wens@csie.org>
Cc:     linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v2 07/16] nvmem: change the signature of nvmem_unregister()
Date:   Fri,  7 Sep 2018 12:07:41 +0200
Message-Id: <20180907100750.14564-8-brgl@bgdev.pl>
In-Reply-To: <20180907100750.14564-1-brgl@bgdev.pl>
References: <20180907100750.14564-1-brgl@bgdev.pl>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

This function can no longer fail and there are no more users that check
it return value. Change it to return void.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/nvmem/core.c           | 8 ++------
 include/linux/nvmem-provider.h | 9 +++------
 2 files changed, 5 insertions(+), 12 deletions(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 2335b72d4b3e..89b91f73d08a 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -450,20 +450,16 @@ static void nvmem_device_release(struct kref *kref)
  * nvmem_unregister() - Unregister previously registered nvmem device
  *
  * @nvmem: Pointer to previously registered nvmem device.
- *
- * Return: Will be an negative on error or a zero on success.
  */
-int nvmem_unregister(struct nvmem_device *nvmem)
+void nvmem_unregister(struct nvmem_device *nvmem)
 {
 	kref_put(&nvmem->refcnt, nvmem_device_release);
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(nvmem_unregister);
 
 static void devm_nvmem_release(struct device *dev, void *res)
 {
-	WARN_ON(nvmem_unregister(*(struct nvmem_device **)res));
+	nvmem_unregister(*(struct nvmem_device **)res);
 }
 
 /**
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
index cc8556e3c825..d14a577a002d 100644
--- a/include/linux/nvmem-provider.h
+++ b/include/linux/nvmem-provider.h
@@ -67,7 +67,7 @@ struct nvmem_config {
 #if IS_ENABLED(CONFIG_NVMEM)
 
 struct nvmem_device *nvmem_register(const struct nvmem_config *cfg);
-int nvmem_unregister(struct nvmem_device *nvmem);
+void nvmem_unregister(struct nvmem_device *nvmem);
 
 struct nvmem_device *devm_nvmem_register(struct device *dev,
 					 const struct nvmem_config *cfg);
@@ -81,10 +81,7 @@ static inline struct nvmem_device *nvmem_register(const struct nvmem_config *c)
 	return ERR_PTR(-ENOSYS);
 }
 
-static inline int nvmem_unregister(struct nvmem_device *nvmem)
-{
-	return -ENOSYS;
-}
+static inline void nvmem_unregister(struct nvmem_device *nvmem) {}
 
 static inline struct nvmem_device *
 devm_nvmem_register(struct device *dev, const struct nvmem_config *c)
@@ -95,7 +92,7 @@ devm_nvmem_register(struct device *dev, const struct nvmem_config *c)
 static inline int
 devm_nvmem_unregister(struct device *dev, struct nvmem_device *nvmem)
 {
-	return nvmem_unregister(nvmem);
+	return ERR_PTR(-ENOSYS);
 
 }
 
-- 
2.18.0