On Wed, Jul 08, 2020 at 03:42:34PM +0300, Gal Pressman wrote: > On 08/07/2020 12:41, liweihang wrote: > > Hi all, > > > > I'm a little confused about the role of IB_QP_CUR_STATE in the enumeration > > ib_qp_attr_mask. > > > > In manual page of ibv_modify_qp(), comments of cur_qp_state is "Assume this > > is the current QP state". Why we need to get current qp state from users > > instead of drivers? > > > > For example, why the users are allowed to modify qp from RTR to RTS again > > even if the qp's state in driver and hardware has already been RTS. > > > > I would be appretiate it if someone can help with this. > > > > Weihang > > > > Talking about IB_QP_CUR_STATE, I see many drivers filling it in their query QP > callback although it should only be used in modify operations.. Is there a > reason not to remove it? IBTA section "11.2.5.3 QUERY QUEUE PAIR" has line about IB_QP_CUR_STATE. It is one of output modifiers. Thanks
