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authorBart Van Assche <bart.vanassche@wdc.com>2018-07-18 09:25:32 -0700
committerJason Gunthorpe <jgg@mellanox.com>2018-07-30 20:09:34 -0600
commitd34ac5cd3a73aacd11009c4fc3ba15d7ea62c411 (patch)
tree153c7ef6cc03750e6fc0d70afd782bf3ddbc4aa7 /drivers/infiniband/hw/qedr/qedr_roce_cm.c
parentIB/mlx5, ib_post_send(), IB_WR_REG_SIG_MR: Do not modify the 'wr' argument (diff)
downloadlinux-dev-d34ac5cd3a73aacd11009c4fc3ba15d7ea62c411.tar.xz
linux-dev-d34ac5cd3a73aacd11009c4fc3ba15d7ea62c411.zip
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 <bart.vanassche@wdc.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/qedr/qedr_roce_cm.c')
-rw-r--r--drivers/infiniband/hw/qedr/qedr_roce_cm.c8
1 files changed, 4 insertions, 4 deletions
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);