From d34ac5cd3a73aacd11009c4fc3ba15d7ea62c411 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Wed, 18 Jul 2018 09:25:32 -0700 Subject: RDMA, core and ULPs: Declare ib_post_send() and ib_post_recv() arguments const Since neither ib_post_send() nor ib_post_recv() modify the data structure their second argument points at, declare that argument const. This change makes it necessary to declare the 'bad_wr' argument const too and also to modify all ULPs that call ib_post_send(), ib_post_recv() or ib_post_srq_recv(). This patch does not change any functionality but makes it possible for the compiler to verify whether the ib_post_(send|recv|srq_recv) really do not modify the posted work request. To make this possible, only one cast had to be introduce that casts away constness, namely in rpcrdma_post_recvs(). The only way I can think of to avoid that cast is to introduce an additional loop in that function or to change the data type of bad_wr from struct ib_recv_wr ** into int (an index that refers to an element in the work request list). However, both approaches would require even more extensive changes than this patch. Signed-off-by: Bart Van Assche Reviewed-by: Chuck Lever Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/qedr/qedr_roce_cm.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/infiniband/hw/qedr/qedr_roce_cm.c') diff --git a/drivers/infiniband/hw/qedr/qedr_roce_cm.c b/drivers/infiniband/hw/qedr/qedr_roce_cm.c index b5d49740bf8a..85578887421b 100644 --- a/drivers/infiniband/hw/qedr/qedr_roce_cm.c +++ b/drivers/infiniband/hw/qedr/qedr_roce_cm.c @@ -537,8 +537,8 @@ static inline int qedr_gsi_build_packet(struct qedr_dev *dev, return 0; } -int qedr_gsi_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, - struct ib_send_wr **bad_wr) +int qedr_gsi_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) { struct qed_roce_ll2_packet *pkt = NULL; struct qedr_qp *qp = get_qedr_qp(ibqp); @@ -607,8 +607,8 @@ err: return rc; } -int qedr_gsi_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, - struct ib_recv_wr **bad_wr) +int qedr_gsi_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) { struct qedr_dev *dev = get_qedr_dev(ibqp->device); struct qedr_qp *qp = get_qedr_qp(ibqp); -- cgit v1.2.3-59-g8ed1b