xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

RDMA, core and ULPs: Declare ib_post_send() and ib_post_recv() arguments const

Browse Source 
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>
This commit is contained in:
Bart Van Assche
2018-07-18 09:25:32 -07:00
committed by Jason Gunthorpe
parent 7bb1fafc2f
commit d34ac5cd3a
43 changed files with 257 additions and 241 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/infiniband/hw/mlx5/gsi.c
View File

@@ -477,8 +477,8 @@ static struct ib_qp *get_tx_qp(struct mlx5_ib_gsi_qp *gsi, struct ib_ud_wr *wr)
return gsi->tx_qps[qp_index];
}
int mlx5_ib_gsi_post_send(struct ib_qp *qp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr)
int mlx5_ib_gsi_post_send(struct ib_qp *qp, const struct ib_send_wr *wr,
const struct ib_send_wr **bad_wr)
{
struct mlx5_ib_gsi_qp *gsi = gsi_qp(qp);
struct ib_qp *tx_qp;
@@ -522,8 +522,8 @@ err:
return ret;
}
int mlx5_ib_gsi_post_recv(struct ib_qp *qp, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr)
int mlx5_ib_gsi_post_recv(struct ib_qp *qp, const struct ib_recv_wr *wr,
const struct ib_recv_wr **bad_wr)
{
struct mlx5_ib_gsi_qp *gsi = gsi_qp(qp);