On Wed, Aug 04, 2021 at 08:59:39PM +0800, YueHaibing wrote:
> If re-registering an MR in hns_roce_rereg_user_mr(), we should
> return NULL instead of pass 0 to ERR_PTR.
>
> Fixes: 4e9fc1dae2a9 ("RDMA/hns: Optimize the MR registration process")
> Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
> ---
> drivers/infiniband/hw/hns/hns_roce_mr.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c
> index 006c84bb3f9f..7089ac780291 100644
> --- a/drivers/infiniband/hw/hns/hns_roce_mr.c
> +++ b/drivers/infiniband/hw/hns/hns_roce_mr.c
> @@ -352,7 +352,9 @@ struct ib_mr *hns_roce_rereg_user_mr(struct ib_mr *ibmr, int flags, u64 start,
> free_cmd_mbox:
> hns_roce_free_cmd_mailbox(hr_dev, mailbox);
>
> - return ERR_PTR(ret);
> + if (ret)
> + return ERR_PTR(ret);
> + return NULL;
> }
I don't understand this function, it returns or ERR_PTR() or NULL, but
should return &mr->ibmr in success path. How does it work?
Thanks
>
> int hns_roce_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
> --
> 2.17.1
>
