iio: imu: adis16460: use DEFINE_DEBUGFS_ATTRIBUTE instead of DEFINE_SIMPLE_ATTRIBUTE

debugfs_create_file_unsafe does not protect the fops handed to it
against file removal. DEFINE_DEBUGFS_ATTRIBUTE makes the fops aware of
the file lifetime and thus protects it against removal.
Signed-off-by: Rohit Sarkar <rohitsarkar5398@gmail.com>
Tested-by Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/adis16460.c

@@ -87,7 +87,7 @@ static int adis16460_show_serial_number(void *arg, u64 *val)
 
 	return 0;
 }
-DEFINE_SIMPLE_ATTRIBUTE(adis16460_serial_number_fops,
+DEFINE_DEBUGFS_ATTRIBUTE(adis16460_serial_number_fops,
 		adis16460_show_serial_number, NULL, "0x%.4llx\n");
 
 static int adis16460_show_product_id(void *arg, u64 *val)
@@ -105,7 +105,7 @@ static int adis16460_show_product_id(void *arg, u64 *val)
 
 	return 0;
 }
-DEFINE_SIMPLE_ATTRIBUTE(adis16460_product_id_fops,
+DEFINE_DEBUGFS_ATTRIBUTE(adis16460_product_id_fops,
 		adis16460_show_product_id, NULL, "%llu\n");
 
 static int adis16460_show_flash_count(void *arg, u64 *val)
@@ -123,19 +123,22 @@ static int adis16460_show_flash_count(void *arg, u64 *val)
 
 	return 0;
 }
-DEFINE_SIMPLE_ATTRIBUTE(adis16460_flash_count_fops,
+DEFINE_DEBUGFS_ATTRIBUTE(adis16460_flash_count_fops,
 		adis16460_show_flash_count, NULL, "%lld\n");
 
 static int adis16460_debugfs_init(struct iio_dev *indio_dev)
 {
 	struct adis16460 *adis16460 = iio_priv(indio_dev);
 
-	debugfs_create_file("serial_number", 0400, indio_dev->debugfs_dentry,
-		adis16460, &adis16460_serial_number_fops);
-	debugfs_create_file("product_id", 0400, indio_dev->debugfs_dentry,
-		adis16460, &adis16460_product_id_fops);
-	debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry,
-		adis16460, &adis16460_flash_count_fops);
+	debugfs_create_file_unsafe("serial_number", 0400,
+			indio_dev->debugfs_dentry, adis16460,
+			&adis16460_serial_number_fops);
+	debugfs_create_file_unsafe("product_id", 0400,
+			indio_dev->debugfs_dentry, adis16460,
+			&adis16460_product_id_fops);
+	debugfs_create_file_unsafe("flash_count", 0400,
+			indio_dev->debugfs_dentry, adis16460,
+			&adis16460_flash_count_fops);
 
 	return 0;
 }