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8 changes: 7 additions & 1 deletion simplyblock_core/controllers/device_controller.py
Original file line number Diff line number Diff line change
Expand Up @@ -450,7 +450,13 @@ def _safe(label, fn):
subsys: list = []

def _get_subsys():
subsys.extend(rpc_client.subsystem_get(device_obj.nvmf_nqn) or [])
# subsystem_get() returns one subsystem dict, or None.
# list.extend(dict) would append the dict's keys instead of the dict.
entry = rpc_client.subsystem_get(device_obj.nvmf_nqn)
if isinstance(entry, dict):
subsys.append(entry)
elif entry:
subsys.extend(entry)
return subsys

_safe("subsystem", _get_subsys)
Expand Down