RDMA/core: Fix unwinding flow in case of error to register device

If port pkey list initialization fails, free the port_immutable memory
during cleanup path. Currently it is missed out.

If cache setup fails, free the pkey list during cleanup path.

Fixes: d291f1a ("IB/core: Enforce PKey security on QPs")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/device.c

@@ -545,14 +545,14 @@ int ib_register_device(struct ib_device *device, const char *name,
 	ret = setup_port_pkey_list(device);
 	if (ret) {
 		dev_warn(&device->dev, "Couldn't create per port_pkey_list\n");
-		goto out;
+		goto port_cleanup;
 	}
 
 	ret = ib_cache_setup_one(device);
 	if (ret) {
 		dev_warn(&device->dev,
 			 "Couldn't set up InfiniBand P_Key/GID cache\n");
-		goto port_cleanup;
+		goto pkey_cleanup;
 	}
 
 	device->index = __dev_new_index();
@@ -596,6 +596,8 @@ int ib_register_device(struct ib_device *device, const char *name,
 cache_cleanup:
 	ib_cache_cleanup_one(device);
 	ib_cache_release_one(device);
+pkey_cleanup:
+	kfree(device->port_pkey_list);
 port_cleanup:
 	kfree(device->port_immutable);
 out: