RE: [PATCH v4 2/4] iw_cxgb4: add queue drain functions

["Steve Wise" <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>]

> On Wed, Feb 17, 2016 at 08:15:42AM -0800, Steve Wise wrote:
> > Add completion objects, named sq_drained and rq_drained, to the c4iw_qp
> > struct.  The queue-specific completion object is signaled when the last
> > CQE is drained from the CQ for that queue.
> >
> > Add c4iw_drain_sq() to block until qp->rq_drained is completed.
> >
> > Add c4iw_drain_rq() to block until qp->sq_drained is completed.
> 
> Hi Steve,
> My knowledge is limited in this driver and I have no illusion that
> question sounds naive, but why did you add these functions to this
> specific driver? Do the other drivers need such update too?
> 
> Thanks

Hey Leon,

I added these so iSER and other storage protocols that are or will be using the drain logic will work on cxgb4.  IB devices should
not need device-specific drain logic since the common core drain works for IB (and I assume RoCE).  iWARP devices, however, require
device-specific logic.  Other iwarp drivers are iw_cxgb3 and iw_nes. 

Steve.

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