drm/nouveau: Fix runtime PM leak in drm_open()

[ Upstream commit 922a8c82fafdec99688bbaea6c5889f562a42cdc ]

Noticed this as I was skimming through, if we fail to allocate memory
for cli we'll end up returning without dropping the runtime PM ref we
got. Additionally, we'll even return the wrong return code! (ret most
likely will == 0 here, we want -ENOMEM).

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 362a34cb435db7ad2b8dd5810c9dd25a0d5b744e..d6f13d7254de96302dd28611d563c228f13cc8e3 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -848,8 +848,10 @@ nouveau_drm_open(struct drm_device *dev, struct drm_file *fpriv)
        get_task_comm(tmpname, current);
        snprintf(name, sizeof(name), "%s[%d]", tmpname, pid_nr(fpriv->pid));
 
-       if (!(cli = kzalloc(sizeof(*cli), GFP_KERNEL)))
-               return ret;
+       if (!(cli = kzalloc(sizeof(*cli), GFP_KERNEL))) {
+               ret = -ENOMEM;
+               goto done;
+       }
 
        ret = nouveau_cli_init(drm, name, cli);
        if (ret)