IB: Fix return value in ib_device_register_sysfs()

If kobject_create_and_add() fails and returns NULL, the current code
in ib_device_register_sysfs() does not set ret and hence returns 0.
Set ret to -ENOMEM for this failure, so that the caller knows that
ib_device_register_sysfs() actually failed.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index c864ef70fdf9..5a4b2e65534b 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -686,8 +686,10 @@ int ib_device_register_sysfs(struct ib_device *device)
 
         device->ports_parent = kobject_create_and_add("ports",
                                         kobject_get(&class_dev->kobj));
-        if (!device->ports_parent)
+        if (!device->ports_parent) {
+                ret = -ENOMEM;
                 goto err_put;
+        }
 
         if (device->node_type == RDMA_NODE_IB_SWITCH) {
                 ret = add_port(device, 0);