drm/nouveau/drm/noveau: fix reference count leak in nouveau_fbcon_open

[ Upstream commit bfad51c7633325b5d4b32444efe04329d53297b2 ]

nouveau_fbcon_open() calls calls pm_runtime_get_sync() that
increments the reference count. In case of failure, decrement the
ref count before returning the error.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index 275abc424ce25e5db29f45481f1a670fc1687585..40da9143f72208a813649addb9fb9ec90881bcec 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -183,8 +183,10 @@ nouveau_fbcon_open(struct fb_info *info, int user)
        struct nouveau_fbdev *fbcon = info->par;
        struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
        int ret = pm_runtime_get_sync(drm->dev->dev);
-       if (ret < 0 && ret != -EACCES)
+       if (ret < 0 && ret != -EACCES) {
+               pm_runtime_put(drm->dev->dev);
                return ret;
+       }
        return 0;
 }