1 files changed, 17 insertions, 26 deletions

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 8684ba2469..fa7cc051b4 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -11,6 +11,7 @@
 
 #include <linux/anon_inodes.h>
 #include <linux/cdev.h>
+#include <linux/cleanup.h>
 #include <linux/debugfs.h>
 #include <linux/device.h>
 #include <linux/err.h>
@@ -1643,11 +1644,10 @@ struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)
 	struct iio_dev *indio_dev;
 	size_t alloc_size;
 
-	alloc_size = sizeof(struct iio_dev_opaque);
-	if (sizeof_priv) {
-		alloc_size = ALIGN(alloc_size, IIO_DMA_MINALIGN);
-		alloc_size += sizeof_priv;
-	}
+	if (sizeof_priv)
+		alloc_size = ALIGN(sizeof(*iio_dev_opaque), IIO_DMA_MINALIGN) + sizeof_priv;
+	else
+		alloc_size = sizeof(*iio_dev_opaque);
 
 	iio_dev_opaque = kzalloc(alloc_size, GFP_KERNEL);
 	if (!iio_dev_opaque)
@@ -1811,31 +1811,24 @@ static long iio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	struct iio_dev *indio_dev = ib->indio_dev;
 	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
 	struct iio_ioctl_handler *h;
-	int ret = -ENODEV;
-
-	mutex_lock(&iio_dev_opaque->info_exist_lock);
+	int ret;
 
+	guard(mutex)(&iio_dev_opaque->info_exist_lock);
 	/*
 	 * The NULL check here is required to prevent crashing when a device
 	 * is being removed while userspace would still have open file handles
 	 * to try to access this device.
 	 */
 	if (!indio_dev->info)
-		goto out_unlock;
+		return -ENODEV;
 
 	list_for_each_entry(h, &iio_dev_opaque->ioctl_handlers, entry) {
 		ret = h->ioctl(indio_dev, filp, cmd, arg);
 		if (ret != IIO_IOCTL_UNHANDLED)
-			break;
+			return ret;
 	}
 
-	if (ret == IIO_IOCTL_UNHANDLED)
-		ret = -ENODEV;
-
-out_unlock:
-	mutex_unlock(&iio_dev_opaque->info_exist_lock);
-
-	return ret;
+	return -ENODEV;
 }
 
 static const struct file_operations iio_buffer_fileops = {
@@ -2063,18 +2056,16 @@ void iio_device_unregister(struct iio_dev *indio_dev)
 
 	cdev_device_del(&iio_dev_opaque->chrdev, &indio_dev->dev);
 
-	mutex_lock(&iio_dev_opaque->info_exist_lock);
+	scoped_guard(mutex, &iio_dev_opaque->info_exist_lock) {
+		iio_device_unregister_debugfs(indio_dev);
 
-	iio_device_unregister_debugfs(indio_dev);
+		iio_disable_all_buffers(indio_dev);
 
-	iio_disable_all_buffers(indio_dev);
+		indio_dev->info = NULL;
 
-	indio_dev->info = NULL;
-
-	iio_device_wakeup_eventset(indio_dev);
-	iio_buffer_wakeup_poll(indio_dev);
-
-	mutex_unlock(&iio_dev_opaque->info_exist_lock);
+		iio_device_wakeup_eventset(indio_dev);
+		iio_buffer_wakeup_poll(indio_dev);
+	}
 
 	iio_buffers_free_sysfs_and_mask(indio_dev);
 }