Re: [PATCH for-rc] RDMA/hns: Fix wrong assignment of lp_pktn_ini in QPC

[Jason Gunthorpe <jgg@nvidia.com>]

On Tue, Jul 14, 2020 at 07:28:58PM +0800, liweihang wrote:
> From: Weihang Li <liweihang@huawei.com>
> 
> The RoCE Engine will schedule to another QP after one has sent
> (2 ^ lp_pktn_ini) packets. lp_pktn_ini is set in QPC and should be
> calculated from 2 factors:
> 1. current MTU as a integer
> 2. the RoCE Engine's maximum slice length 64KB
> But the driver use MTU as a enum ib_mtu and the max inline capability,
> the lp_pktn_ini will be much bigger than expected which may cause traffic
> of some QPs never get scheduled.
> 
> Fixes: b713128de7a1 ("RDMA/hns: Adjust lp_pktn_ini dynamically")
> Signed-off-by: Weihang Li <liweihang@huawei.com>
> ---
>  drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 34 +++++++++++++++++++-----------
>  1 file changed, 22 insertions(+), 12 deletions(-)

Applied to for-rc, thanks

Jason