platform/x86: intel_scu_ipc: fix possible name leak in __intel_scu_ip…

…c_register()

[ Upstream commit 0b3d0cb ]

In some error paths before device_register(), the names allocated
by dev_set_name() are not freed. Move dev_set_name() front to
device_register(), so the name can be freed while calling
put_device().

Fixes: 54b34aa ("platform/x86: intel_scu_ipc: Split out SCU IPC functionality from the SCU driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221208151916.2404977-1-yangyingliang@huawei.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/platform/x86/intel_scu_ipc.c

@@ -583,7 +583,6 @@ __intel_scu_ipc_register(struct device *parent,
 	scu->dev.parent = parent;
 	scu->dev.class = &intel_scu_ipc_class;
 	scu->dev.release = intel_scu_ipc_release;
-	dev_set_name(&scu->dev, "intel_scu_ipc");
 
 	if (!request_mem_region(scu_data->mem.start, resource_size(&scu_data->mem),
 				"intel_scu_ipc")) {
@@ -612,6 +611,7 @@ __intel_scu_ipc_register(struct device *parent,
 	 * After this point intel_scu_ipc_release() takes care of
 	 * releasing the SCU IPC resources once refcount drops to zero.
 	 */
+	dev_set_name(&scu->dev, "intel_scu_ipc");
 	err = device_register(&scu->dev);
 	if (err) {
 		put_device(&scu->dev);