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[4.4,22/62] drm/nouveau/drm/noveau: fix reference count leak in nouveau_fbcon_open

Message ID 20200901150921.851558358@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Sept. 1, 2020, 3:10 p.m. UTC 
From: Aditya Pakki <pakki001@umn.edu>

[ 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>
---
 drivers/gpu/drm/nouveau/nouveau_fbcon.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index edb3a23ded5d5..11183839f6fad 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -184,8 +184,10 @@  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;
 }