On Wed, Feb 09, 2022 at 02:23:00PM +0100, Håkon Bugge wrote:
> XRC INI QPs should be able to adjust their local ACK timeout.
>
> Fixes: 2c1619edef61 ("IB/cma: Define option to set ack timeout and pack tos_set")
> Signed-off-by: Håkon Bugge <haakon.bugge@xxxxxxxxxx>
> Suggested-by: Avneesh Pant <avneesh.pant@xxxxxxxxxx>
>
> ---
>
> To avoid excessive discussions around the *if (WARN_ON( ...*
> construct, just saying that it has been sanctioned by Jason here:
>
> https://lore.kernel.org/linux-rdma/20210413135120.GT7405@xxxxxxxxxx/
And I think that this is wrong, because it cane be triggered by user.
1. Create cm_id with any QP type you want - ucma_create_id()
2. Call to set option - ucma_set_option()
3. See WARN_ON.
Thanks
> ---
> drivers/infiniband/core/cma.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
> index 0f5f0d7..006ea9c 100644
> --- a/drivers/infiniband/core/cma.c
> +++ b/drivers/infiniband/core/cma.c
> @@ -2811,7 +2811,7 @@ int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout)
> {
> struct rdma_id_private *id_priv;
>
> - if (id->qp_type != IB_QPT_RC)
> + if (WARN_ON(id->qp_type != IB_QPT_RC && id->qp_type != IB_QPT_XRC_INI))
> return -EINVAL;
>
> id_priv = container_of(id, struct rdma_id_private, id);
> --
> 1.8.3.1
>
