Re: [PATCH 2/2] IB/mad: Use IDR for agent IDs

[Leon Romanovsky <leon@kernel.org>]

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On Sun, Jun 10, 2018 at 02:30:27PM -0600, Jason Gunthorpe wrote:
> On Sun, Jun 10, 2018 at 03:25:05PM +0300, Leon Romanovsky wrote:
> > On Sun, Jun 10, 2018 at 03:43:05AM -0700, Matthew Wilcox wrote:
> > > On Sun, Jun 10, 2018 at 09:30:28AM +0300, Leon Romanovsky wrote:
> > > > 1. IBTA spec doesn't talk at all about the size of TransactionID, more
> > > > on that in section "13.4.6.4 TRANSACTION ID USAGE", the specification
> > > > says: "The contents of the TransactionID (TID) field are implementation-
> > > > dependent. So let's don't call it mlx4 bug.
> > >
> > > I was loosely paraphrasing the original bug report; suggested rewording
> > > of the comments gratefully accepted.
> >
> > Just replace "mlx4 bug" with something like "to comply with mlx4
> > implementation".
>
> Well, it is a bug. Blindly replacing the upper 8 bits of the TID in a
> driver without accommodation from the core is totally, bonkers wrong.

I provided cite from spec that says that TID can be whatever you want as
long as you success to do it unique.

>
> The original concept was that the 1<<24 limit would come from the
> driver and only mlx4 would have less than 1<<32, because only mlx4
> does this thing..
>
> Thanks Matt,
> Jason
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