diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index a2117ad1337d..b9f4113ae5fc 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -410,11 +410,12 @@ static ssize_t iio_debugfs_write_reg(struct file *file,
 	char buf[80];
 	int ret;
 
-	count = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, userbuf, count))
-		return -EFAULT;
+	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, userbuf,
+				     count);
+	if (ret < 0)
+		return ret;
 
-	buf[count] = 0;
+	buf[count] = '\0';
 
 	ret = sscanf(buf, "%i %i", &reg, &val);