netdev - RE: [PATCH 4/9] ocrdma: Driver for Emulex OneConnect RDMA adapter

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Date:	Wed, 21 Mar 2012 12:46:51 -0700
From:	<Parav.Pandit@...lex.Com>
To:	<roland@...estorage.com>
CC:	<linux-rdma@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: RE: [PATCH 4/9] ocrdma: Driver for Emulex OneConnect RDMA adapter



> -----Original Message-----
> From: Roland Dreier [mailto:roland@...estorage.com]
> Sent: Thursday, March 22, 2012 1:02 AM
> To: Pandit, Parav
> Cc: linux-rdma@...r.kernel.org; netdev@...r.kernel.org
> Subject: Re: [PATCH 4/9] ocrdma: Driver for Emulex OneConnect RDMA
> adapter
> 
> On Wed, Mar 21, 2012 at 12:09 PM,  <Parav.Pandit@...lex.com> wrote:
> > Yes. Driver needs to put QP to flush state. So that appropriate CQEs can be
> returned during poll_cq() phase.
> > So state machine is implemented above.
> 
> Couldn't you just write
> 
>     if (ib_modify_qp_is_ok(...)) {
>         if (new_state == OCRDMA_QPS_ERR)
>             ocrdma_flush_qp(qp);
>     } else {
>         status = -EINVAL;
>     }
> 
> and save about 100 lines of code?
> 
Yes, this can be done. This is one path.
Another path is async_event coming from adapter. So I still need qp_state_machine function but as you suggested, I'll remove the states and will have invoke flush_qp() on error.

>  - R.
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