drm/nouveau: fix nouveau_client allocation failure path

Depending on the point of failure, freed object would be returned
or memory leak would happen.
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/core/client.c

@@ -66,10 +66,8 @@ nouveau_client_create_(const char *name, u64 devname, const char *cfg,
 
 	ret = nouveau_handle_create(nv_object(client), ~0, ~0,
 				    nv_object(client), &client->root);
-	if (ret) {
-		nouveau_namedb_destroy(&client->base);
+	if (ret)
 		return ret;
-	}
 
 	/* prevent init/fini being called, os in in charge of this */
 	atomic_set(&nv_object(client)->usecount, 2);

drivers/gpu/drm/nouveau/core/include/core/client.h

@@ -36,6 +36,9 @@ nouveau_client(void *obj)
 
 int  nouveau_client_create_(const char *name, u64 device, const char *cfg,
 			    const char *dbg, int, void **);
+#define nouveau_client_destroy(p)                                              \
+	nouveau_namedb_destroy(&(p)->base)
+
 int  nouveau_client_init(struct nouveau_client *);
 int  nouveau_client_fini(struct nouveau_client *, bool suspend);
 

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -84,11 +84,16 @@ nouveau_cli_create(struct pci_dev *pdev, const char *name,
 	struct nouveau_cli *cli;
 	int ret;
 
+	*pcli = NULL;
 	ret = nouveau_client_create_(name, nouveau_name(pdev), nouveau_config,
 				     nouveau_debug, size, pcli);
 	cli = *pcli;
-	if (ret)
+	if (ret) {
+		if (cli)
+			nouveau_client_destroy(&cli->base);
+		*pcli = NULL;
 		return ret;
+	}
 
 	mutex_init(&cli->mutex);
 	return 0;