From: Ocean He <hehy1(a)lenovo.com&gt; The id check was not executed immediately following ida_simple_get. Just change the codes position, without function change. Signed-off-by: Ocean He <hehy1(a)lenovo.com&gt; --- drivers/nvdimm/bus.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 27902a8..ab28e7c 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -350,12 +350,12 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent, INIT_LIST_HEAD(&nvdimm_bus->mapping_list); init_waitqueue_head(&nvdimm_bus->probe_wait); nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL); - mutex_init(&nvdimm_bus->reconfig_mutex); - badrange_init(&nvdimm_bus->badrange); if (nvdimm_bus->id < 0) { kfree(nvdimm_bus); return NULL; } + mutex_init(&nvdimm_bus->reconfig_mutex); + badrange_init(&nvdimm_bus->badrange); nvdimm_bus->nd_desc = nd_desc; nvdimm_bus->dev.parent = parent; nvdimm_bus->dev.release = nvdimm_bus_release; -- 1.8.3.1