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Subject[PATCH] RDMA/siw: Mark expected switch fall-throughs
In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

drivers/infiniband/sw/siw/siw_qp_rx.c: In function ‘siw_rdmap_complete’:
drivers/infiniband/sw/siw/siw_qp_rx.c:1214:18: warning: this statement may fall through [-Wimplicit-fallthrough=]
wqe->rqe.flags |= SIW_WQE_SOLICITED;
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
drivers/infiniband/sw/siw/siw_qp_rx.c:1215:2: note: here
case RDMAP_SEND:
^~~~

drivers/infiniband/sw/siw/siw_qp_tx.c: In function ‘siw_qp_sq_process’:
drivers/infiniband/sw/siw/siw_qp_tx.c:1044:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
siw_wqe_put_mem(wqe, tx_type);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/sw/siw/siw_qp_tx.c:1045:3: note: here
case SIW_OP_INVAL_STAG:
^~~~
drivers/infiniband/sw/siw/siw_qp_tx.c:1128:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
siw_wqe_put_mem(wqe, tx_type);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/sw/siw/siw_qp_tx.c:1129:3: note: here
case SIW_OP_INVAL_STAG:
^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---

NOTE: -Wimplicit-fallthrough will be enabled globally in v5.3. So, I
suggest you to take this patch for 5.3-rc1.

drivers/infiniband/sw/siw/siw_qp_rx.c | 2 ++
drivers/infiniband/sw/siw/siw_qp_tx.c | 4 ++++
2 files changed, 6 insertions(+)

diff --git a/drivers/infiniband/sw/siw/siw_qp_rx.c b/drivers/infiniband/sw/siw/siw_qp_rx.c
index 682a290bc11e..f87657a11657 100644
--- a/drivers/infiniband/sw/siw/siw_qp_rx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_rx.c
@@ -1212,6 +1212,8 @@ static int siw_rdmap_complete(struct siw_qp *qp, int error)
case RDMAP_SEND_SE:
case RDMAP_SEND_SE_INVAL:
wqe->rqe.flags |= SIW_WQE_SOLICITED;
+ /* Fall through */
+
case RDMAP_SEND:
case RDMAP_SEND_INVAL:
if (wqe->wr_status == SIW_WR_IDLE)
diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c
index f0d949e2e318..43020d2040fc 100644
--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
@@ -1042,6 +1042,8 @@ int siw_qp_sq_process(struct siw_qp *qp)
case SIW_OP_SEND_REMOTE_INV:
case SIW_OP_WRITE:
siw_wqe_put_mem(wqe, tx_type);
+ /* Fall through */
+
case SIW_OP_INVAL_STAG:
case SIW_OP_REG_MR:
if (tx_flags(wqe) & SIW_WQE_SIGNALLED)
@@ -1126,6 +1128,8 @@ int siw_qp_sq_process(struct siw_qp *qp)
case SIW_OP_READ:
case SIW_OP_READ_LOCAL_INV:
siw_wqe_put_mem(wqe, tx_type);
+ /* Fall through */
+
case SIW_OP_INVAL_STAG:
case SIW_OP_REG_MR:
siw_sqe_complete(qp, &wqe->sqe, wqe->bytes,
--
2.21.0
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