RDMA/core: No need to protect kfree with spin lock and semaphore

While unregistering a client, only context removal should be protected
with lock. There is no need to protect a freeing of such context which is
already removed from the list.

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: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/device.c

@@ -700,9 +700,9 @@ void ib_unregister_client(struct ib_client *client)
 		down_write(&lists_rwsem);
 		spin_lock_irqsave(&device->client_data_lock, flags);
 		list_del(&found_context->list);
-		kfree(found_context);
 		spin_unlock_irqrestore(&device->client_data_lock, flags);
 		up_write(&lists_rwsem);
+		kfree(found_context);
 	}
 
 	mutex_unlock(&device_mutex);