From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Tue, 18 Jun 2019 15:54:40 +0000 (+0200)
Subject: iio: core: no need to check return value of debugfs_create functions
X-Git-Tag: v5.3-rc1~126^2~38^2~12
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=8915aacac4dd5326a07f6b9c01f266289c57c71e;p=linux-block.git

iio: core: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: linux-iio@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index dd8873a752dd..85a699b5ae96 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -369,39 +369,25 @@ static void iio_device_unregister_debugfs(struct iio_dev *indio_dev)
 	debugfs_remove_recursive(indio_dev->debugfs_dentry);
 }
 
-static int iio_device_register_debugfs(struct iio_dev *indio_dev)
+static void iio_device_register_debugfs(struct iio_dev *indio_dev)
 {
-	struct dentry *d;
-
 	if (indio_dev->info->debugfs_reg_access == NULL)
-		return 0;
+		return;
 
 	if (!iio_debugfs_dentry)
-		return 0;
+		return;
 
 	indio_dev->debugfs_dentry =
 		debugfs_create_dir(dev_name(&indio_dev->dev),
 				   iio_debugfs_dentry);
-	if (indio_dev->debugfs_dentry == NULL) {
-		dev_warn(indio_dev->dev.parent,
-			 "Failed to create debugfs directory\n");
-		return -EFAULT;
-	}
-
-	d = debugfs_create_file("direct_reg_access", 0644,
-				indio_dev->debugfs_dentry,
-				indio_dev, &iio_debugfs_reg_fops);
-	if (!d) {
-		iio_device_unregister_debugfs(indio_dev);
-		return -ENOMEM;
-	}
 
-	return 0;
+	debugfs_create_file("direct_reg_access", 0644,
+			    indio_dev->debugfs_dentry, indio_dev,
+			    &iio_debugfs_reg_fops);
 }
 #else
-static int iio_device_register_debugfs(struct iio_dev *indio_dev)
+static void iio_device_register_debugfs(struct iio_dev *indio_dev)
 {
-	return 0;
 }
 
 static void iio_device_unregister_debugfs(struct iio_dev *indio_dev)
@@ -1674,12 +1660,7 @@ int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod)
 	/* configure elements for the chrdev */
 	indio_dev->dev.devt = MKDEV(MAJOR(iio_devt), indio_dev->id);
 
-	ret = iio_device_register_debugfs(indio_dev);
-	if (ret) {
-		dev_err(indio_dev->dev.parent,
-			"Failed to register debugfs interfaces\n");
-		return ret;
-	}
+	iio_device_register_debugfs(indio_dev);
 
 	ret = iio_buffer_alloc_sysfs_and_mask(indio_dev);
 	if (ret) {