> -----Original Message-----
> From: linux-rdma-ow...@vger.kernel.org [mailto:linux-rdma-
> ow...@vger.kernel.org] On Behalf Of Leon Romanovsky
> Sent: Thursday, September 15, 2016 11:08 AM
> To: Salil Mehta
> Cc: dledf...@redhat.com; Huwei (Xavier); oulijun; Zhuangyuzeng (Yisen);
> xuwei (O); mehta.salil....@gmail.com; linux-r...@vger.kernel.org;
> linux-kernel@vger.kernel.org; Linuxarm
> Subject: Re: [PATCH for-next 03/20] IB/hns: Add the check for pointer
> ctrl
> 
> On Fri, Sep 09, 2016 at 06:30:34PM +0800, Salil Mehta wrote:
> > From: Lijun Ou <ouli...@huawei.com>
> >
> > The pointer ctrl may be null, so we add check for it.
> >
> > Signed-off-by: Lijun Ou <ouli...@huawei.com>
> > Reviewed-by: Wei Hu <xavier.hu...@huawei.com>
> > Signed-off-by: Salil Mehta <salil.me...@huawei.com>
> > ---
> >  drivers/infiniband/hw/hns/hns_roce_hw_v1.c |    6 ++++++
> >  1 file changed, 6 insertions(+)
> >
> > diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> > index 5f76fc1..ea47ec4 100644
> > --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> > +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> > @@ -336,6 +336,12 @@ int hns_roce_v1_post_recv(struct ib_qp *ibqp,
> struct ib_recv_wr *wr,
> >             }
> >
> >             ctrl = get_recv_wqe(hr_qp, ind);
> > +           if (unlikely(!ctrl)) {
> 
> Yes, as you wrote, this check and patch are redundant too.
I have dropped this patch in reworked V2 patch and introduced new patch
to remove the redundant code as well in get_recv_wqe() and get_send_wqe().

Thanks
Salil
> 
> > +                   dev_err(dev, "Get recv wqe failed!\n");
> > +                   ret = -EINVAL;
> > +                   *bad_wr = wr;
> > +                   goto out;
> > +           }
> >
> >             roce_set_field(ctrl->rwqe_byte_12,
> >                            RQ_WQE_CTRL_RWQE_BYTE_12_RWQE_SGE_NUM_M,
> > --
> > 1.7.9.5
> >
> > --
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