[PATCH 5/7] iio: core: simplify some devm functions

From: Yicong Yang <yangyicong@hisilicon.com>
To: <jic23@kernel.org>, <linux-iio@vger.kernel.org>
Cc: <lars@metafoo.de>, <Michael.Hennerich@analog.com>,
	<pmeerw@pmeerw.net>, <prime.zeng@huawei.com>,
	<tiantao6@hisilicon.com>, <yangyicong@hisilicon.com>
Subject: [PATCH 5/7] iio: core: simplify some devm functions
Date: Thu, 8 Apr 2021 19:38:14 +0800	[thread overview]
Message-ID: <1617881896-3164-6-git-send-email-yangyicong@hisilicon.com> (raw)
In-Reply-To: <1617881896-3164-1-git-send-email-yangyicong@hisilicon.com>

Use devm_add_action_or_reset() instead of devres_alloc() and
devres_add(), which works the same. This will simplify the
code. There is no functional changes.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
---
 drivers/iio/industrialio-core.c | 43 +++++++++++++++--------------------------
 1 file changed, 16 insertions(+), 27 deletions(-)

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 7db761a..2dfbed3 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1627,9 +1627,9 @@ void iio_device_free(struct iio_dev *dev)
 }
 EXPORT_SYMBOL(iio_device_free);
 
-static void devm_iio_device_release(struct device *dev, void *res)
+static void devm_iio_device_release(void *iio_dev)
 {
-	iio_device_free(*(struct iio_dev **)res);
+	iio_device_free(iio_dev);
 }
 
 /**
@@ -1645,20 +1645,17 @@ static void devm_iio_device_release(struct device *dev, void *res)
  */
 struct iio_dev *devm_iio_device_alloc(struct device *parent, int sizeof_priv)
 {
-	struct iio_dev **ptr, *iio_dev;
-
-	ptr = devres_alloc(devm_iio_device_release, sizeof(*ptr),
-			   GFP_KERNEL);
-	if (!ptr)
-		return NULL;
+	struct iio_dev *iio_dev;
+	int ret;
 
 	iio_dev = iio_device_alloc(parent, sizeof_priv);
-	if (iio_dev) {
-		*ptr = iio_dev;
-		devres_add(parent, ptr);
-	} else {
-		devres_free(ptr);
-	}
+	if (!iio_dev)
+		return iio_dev;
+
+	ret = devm_add_action_or_reset(parent, devm_iio_device_release,
+				       iio_dev);
+	if (ret)
+		return ERR_PTR(ret);
 
 	return iio_dev;
 }
@@ -1889,29 +1886,21 @@ void iio_device_unregister(struct iio_dev *indio_dev)
 }
 EXPORT_SYMBOL(iio_device_unregister);
 
-static void devm_iio_device_unreg(struct device *dev, void *res)
+static void devm_iio_device_unreg(void *indio_dev)
 {
-	iio_device_unregister(*(struct iio_dev **)res);
+	iio_device_unregister(indio_dev);
 }
 
 int __devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev,
 			       struct module *this_mod)
 {
-	struct iio_dev **ptr;
 	int ret;
 
-	ptr = devres_alloc(devm_iio_device_unreg, sizeof(*ptr), GFP_KERNEL);
-	if (!ptr)
-		return -ENOMEM;
-
-	*ptr = indio_dev;
 	ret = __iio_device_register(indio_dev, this_mod);
-	if (!ret)
-		devres_add(dev, ptr);
-	else
-		devres_free(ptr);
+	if (ret)
+		return ret;
 
-	return ret;
+	return devm_add_action_or_reset(dev, devm_iio_device_unreg, indio_dev);
 }
 EXPORT_SYMBOL_GPL(__devm_iio_device_register);
 
-- 
2.8.1

