On Tue, Jan 22, 2019 at 09:05:26AM -0700, Jason Gunthorpe wrote:
> On Tue, Jan 22, 2019 at 04:39:17PM +0800, Lijun Ou wrote:
> > The hns_roce_ib_create_srq_resp is used to interact with the
> > user for data. As a result, it is added to tranfer the srqn
> > to the user.
> >
> > Signed-off-by: Lijun Ou <oulijun@xxxxxxxxxx>
> > ---
> > V1->V2:
> > - Use hns_roce_ib_create_srq_resp to transfer srqn
> > ---
> > drivers/infiniband/hw/hns/hns_roce_srq.c | 4 +++-
> > include/uapi/rdma/hns-abi.h | 5 +++++
> > 2 files changed, 8 insertions(+), 1 deletion(-)
>
> Yes, okay, this is better
>
> > diff --git a/drivers/infiniband/hw/hns/hns_roce_srq.c b/drivers/infiniband/hw/hns/hns_roce_srq.c
> > index 8975f85..8492153 100644
> > --- a/drivers/infiniband/hw/hns/hns_roce_srq.c
> > +++ b/drivers/infiniband/hw/hns/hns_roce_srq.c
> > @@ -210,6 +210,7 @@ struct ib_srq *hns_roce_create_srq(struct ib_pd *pd,
> > struct ib_udata *udata)
> > {
> > struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
> > + struct hns_roce_ib_create_srq_resp resp = {};
> > struct hns_roce_srq *srq;
> > int srq_desc_size;
> > int srq_buf_size;
> > @@ -377,9 +378,10 @@ struct ib_srq *hns_roce_create_srq(struct ib_pd *pd,
> >
> > srq->event = hns_roce_ib_srq_event;
> > srq->ibsrq.ext.xrc.srq_num = srq->srqn;
> > + resp.srqn = srq->srqn;
> >
> > if (udata) {
> > - if (ib_copy_to_udata(udata, &srq->srqn, sizeof(__u32))) {
> > + if (ib_copy_to_udata(udata, &resp, sizeof(resp))) {
>
> min(udata->outlen, sizeof(resp))
IMHO, we should update ib_copy_to_udata() to have 4 parameters instead
of 3 and do min() internally.
Thanks
>
> Jason
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