Hello Lijun Ou,
The patch a2f3d4479fe9: "RDMA/hns: Avoid unncessary initialization"
from Sep 8, 2020, leads to the following static checker warning:
drivers/infiniband/hw/hns/hns_roce_hw_v1.c:282 hns_roce_v1_post_send()
error: uninitialized symbol 'ps_opcode'.
drivers/infiniband/hw/hns/hns_roce_hw_v1.c
256 switch (wr->opcode) {
257 case IB_WR_RDMA_READ:
258 ps_opcode = HNS_ROCE_WQE_OPCODE_RDMA_READ;
259 set_raddr_seg(wqe, rdma_wr(wr)->remote_addr,
260 rdma_wr(wr)->rkey);
261 break;
262 case IB_WR_RDMA_WRITE:
263 case IB_WR_RDMA_WRITE_WITH_IMM:
264 ps_opcode = HNS_ROCE_WQE_OPCODE_RDMA_WRITE;
265 set_raddr_seg(wqe, rdma_wr(wr)->remote_addr,
266 rdma_wr(wr)->rkey);
267 break;
268 case IB_WR_SEND:
269 case IB_WR_SEND_WITH_INV:
270 case IB_WR_SEND_WITH_IMM:
271 ps_opcode = HNS_ROCE_WQE_OPCODE_SEND;
272 break;
273 case IB_WR_LOCAL_INV:
^^^^^^^^^^^^^^^^^^^^
"ps_opcode" is not initialized for this case statement.
274 break;
275 case IB_WR_ATOMIC_CMP_AND_SWP:
276 case IB_WR_ATOMIC_FETCH_AND_ADD:
277 case IB_WR_LSO:
278 default:
279 ps_opcode = HNS_ROCE_WQE_OPCODE_MASK;
280 break;
281 }
282 ctrl->flag |= cpu_to_le32(ps_opcode);
^^^^^^^^^
Uninitialized.
283 wqe += sizeof(struct hns_roce_wqe_raddr_seg);
284
285 dseg = wqe;
regards,
dan carpenter
