Re: [PATCH v3 07/28] IB/Verbs: Reform IB-ulp ipoib

From: Michael Wang
Date: Wed Apr 15 2015 - 03:58:39 EST

On 04/14/2015 08:21 PM, Jason Gunthorpe wrote:
> On Tue, Apr 14, 2015 at 06:02:47PM +0000, Hefty, Sean wrote:
>>> Yes, that is the only reasonable thing that could happen.
>>> init failure should only be possible under exceptional cases (OOM).
>>> The only system response is to call ib_umad_add_one again - so of
>>> course the first call had to completely clean up everything it did.
>> A reasonable follow up change would be to replace the add device
>> callbacks with add port callbacks.
> Yes, combined with a port argument to ib_set_client_data /
> ib_get_client_data it would be a nice simplifying clean up.
> It would be nice to have sane error handling too :( In an ideal world
> the add call back should return an error and the thing that triggered
> it should unwind back to module load failure.

We can give client->add() callback a return value and make ib_register_device()
return -ENOMEM when it failed, just wondering why we don't do this at first, any
special reason?

Michael Wang

> Jason
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