linux-kernel - Re: [PATCH for-next 18/20] IB/hns: Update the rq head when modify qp state

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Date:   Tue, 20 Sep 2016 20:05:53 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Salil Mehta <salil.mehta@...wei.com>
Cc:     "dledford@...hat.com" <dledford@...hat.com>,
        "Huwei (Xavier)" <xavier.huwei@...wei.com>,
        oulijun <oulijun@...wei.com>,
        "Zhuangyuzeng (Yisen)" <yisen.zhuang@...wei.com>,
        "xuwei (O)" <xuwei5@...ilicon.com>,
        "mehta.salil.lnk@...il.com" <mehta.salil.lnk@...il.com>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linuxarm <linuxarm@...wei.com>
Subject: Re: [PATCH for-next 18/20] IB/hns: Update the rq head when modify qp
 state

On Tue, Sep 20, 2016 at 04:56:35PM +0000, Salil Mehta wrote:
>
>
> > -----Original Message-----
> > From: Leon Romanovsky [mailto:leon@...nel.org]
> > Sent: Thursday, September 15, 2016 11:13 AM
> > To: Salil Mehta
> > Cc: dledford@...hat.com; Huwei (Xavier); oulijun; Zhuangyuzeng (Yisen);
> > xuwei (O); mehta.salil.lnk@...il.com; linux-rdma@...r.kernel.org;
> > linux-kernel@...r.kernel.org; Linuxarm
> > Subject: Re: [PATCH for-next 18/20] IB/hns: Update the rq head when
> > modify qp state
> >
> > On Fri, Sep 09, 2016 at 06:30:49PM +0800, Salil Mehta wrote:
> > > From: Lijun Ou <oulijun@...wei.com>
> > >
> > > The rq head in qpc was zero will miss the rq wqes which
> > > have be sent, so here we should take the real value.
> > >
> > > Signed-off-by: Lijun Ou <oulijun@...wei.com>
> > > Reviewed-by:  Wei Hu (Xavier) <xavier.huwei@...wei.com>
> > > Signed-off-by: Salil Mehta <salil.mehta@...wei.com>
> > > ---
> > >  drivers/infiniband/hw/hns/hns_roce_hw_v1.c |    3 ++-
> > >  1 file changed, 2 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> > b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> > > index bdd9453..7a61d7e 100644
> > > --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> > > +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> > > @@ -2266,7 +2266,8 @@ static int hns_roce_v1_m_qp(struct ib_qp *ibqp,
> > const struct ib_qp_attr *attr,
> > >
> > >  		roce_set_field(context->qpc_bytes_68,
> > >  			       QP_CONTEXT_QPC_BYTES_68_RQ_HEAD_M,
> > > -			       QP_CONTEXT_QPC_BYTES_68_RQ_HEAD_S, 0);
> > > +			       QP_CONTEXT_QPC_BYTES_68_RQ_HEAD_S,
> > > +			       hr_qp->rq.head);
> >
> > Are you sure that it should be list_head and not value?
> This is correct. Variable head is not list_head but a u32 value.
> Hope I understood your point correctly.

Thanks, you understood me right.
The name "head" mislead me.
Sorry for that.

>
> Best regards
> Salil
> >
> > >  		roce_set_field(context->qpc_bytes_68,
> > >  			       QP_CONTEXT_QPC_BYTES_68_RQ_CUR_INDEX_M,
> > >  			       QP_CONTEXT_QPC_BYTES_68_RQ_CUR_INDEX_S, 0);
> > > --
> > > 1.7.9.5
> > >
> > > --
> > > To unsubscribe from this list: send the line "unsubscribe linux-rdma"
> > in
> > > the body of a message to majordomo@...r.kernel.org
> > > More majordomo info at  http://vger.kernel.org/majordomo-info.html

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