When using single_open() for opening, single_release() should be
called, otherwise the 'op' allocated in single_open() will be leaked.

Fixes: 6e9fc177399f ("drm/nouveau/debugfs: add copy of sysfs pstate interface 
ported to debugfs")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Yang Yingliang <yangyingli...@huawei.com>
---
 drivers/gpu/drm/nouveau/nouveau_debugfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c 
b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
index c2bc05eb2e54..1cbe01048b93 100644
--- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c
+++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
@@ -207,6 +207,7 @@ static const struct file_operations nouveau_pstate_fops = {
        .open = nouveau_debugfs_pstate_open,
        .read = seq_read,
        .write = nouveau_debugfs_pstate_set,
+       .release = single_release,
 };
 
 static struct drm_info_list nouveau_debugfs_list[] = {
-- 
2.25.1

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