diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
index f1a9c0544e3f7f5fc63c8f87298c5630c3254e4b..213aedc97dc2e7d37c04194b889d95acb7763df5 100644
--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -309,6 +309,7 @@ static const struct file_operations gpio_mockup_debugfs_ops = {
 	.read = gpio_mockup_debugfs_read,
 	.write = gpio_mockup_debugfs_write,
 	.llseek = no_llseek,
+	.release = single_release,
 };
 
 static void gpio_mockup_debugfs_setup(struct device *dev,