Re: [PATCH for-next 1/2] RDMA/cma: Remove unnecessary INIT->INIT transition

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On Tue, Jun 22, 2021 at 02:53:33PM +0000, Haakon Bugge wrote:
> 
> 
> > On 22 Jun 2021, at 16:47, Jason Gunthorpe <jgg@xxxxxxxxxx> wrote:
> > 
> > On Tue, Jun 22, 2021 at 03:20:29PM +0200, Håkon Bugge wrote:
> >> In rdma_create_qp(), a connected QP will be transitioned to the INIT
> >> state.
> >> 
> >> Afterwards, the QP will be transitioned to the RTR state by the
> >> cma_modify_qp_rtr() function. But this function starts by performing
> >> an ib_modify_qp() to the INIT state again, before another
> >> ib_modify_qp() is performed to transition the QP to the RTR state.
> > 
> > This makes me really nervous that something depends on this since the
> > API is split up??
> 
> As I commented to Mark, no ULP creates a connected QP with
> rdma_create_qp() and thereafter modifies it with an INIT -> INIT
> transition. And if it did, the values modified would be overwritten
> by the (now) RESET -> INIT transition when cma_modify_qp_rtr() is
> called.

Does anything call query_qp?

Jason



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