From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Date: Fri, 14 Oct 2016 07:28:37 +0000 Subject: [patch 1/2] IB/hns: Fix a couple pointer math bugs Message-Id: <20161014072837.GA15238@mwanda> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Lijun Ou Cc: "Wei Hu(Xavier)" , Doug Ledford , Sean Hefty , Hal Rosenstock , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kernel-janitors-u79uwXL29TY76Z2rM5mHXA@public.gmane.org "wqe" is a void pointer so adding sizeof() works. The original code adds sizeof() multiplied by sizeof() so it doesn't work at all. Fixes: 9a4435375cd1 ('IB/hns: Add driver files for hns RoCE driver') Signed-off-by: Dan Carpenter diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c index 399f5de..58b150e 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c @@ -205,8 +205,7 @@ int hns_roce_v1_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, (wr->send_flags & IB_SEND_FENCE ? (cpu_to_le32(HNS_ROCE_WQE_FENCE)) : 0); - wqe = (struct hns_roce_wqe_ctrl_seg *)wqe + - sizeof(struct hns_roce_wqe_ctrl_seg); + wqe = wqe + sizeof(struct hns_roce_wqe_ctrl_seg); switch (wr->opcode) { case IB_WR_RDMA_READ: @@ -235,8 +234,7 @@ int hns_roce_v1_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, break; } ctrl->flag |= cpu_to_le32(ps_opcode); - wqe = (struct hns_roce_wqe_raddr_seg *)wqe + - sizeof(struct hns_roce_wqe_raddr_seg); + wqe = wqe + sizeof(struct hns_roce_wqe_raddr_seg); dseg = wqe; if (wr->send_flags & IB_SEND_INLINE && wr->num_sge) {