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

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Message-ID: <20150414175904.GB13896@obsidianresearch.com>
Date:	Tue, 14 Apr 2015 11:59:04 -0600
From:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:	"ira.weiny" <ira.weiny@...el.com>
Cc:	Michael Wang <yun.wang@...fitbricks.com>,
	Roland Dreier <roland@...nel.org>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tom Tucker <tom@...ngridcomputing.com>,
	Steve Wise <swise@...ngridcomputing.com>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	Mike Marciniszyn <infinipath@...el.com>,
	Eli Cohen <eli@...lanox.com>,
	Faisal Latif <faisal.latif@...el.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>,
	Tom Talpey <tom@...pey.com>, Doug Ledford <dledford@...hat.com>
Subject: Re: [PATCH v3 07/28] IB/Verbs: Reform IB-ulp ipoib

On Tue, Apr 14, 2015 at 01:43:11PM -0400, ira.weiny wrote:
 
> A failure to init port 2 ends up ends up "killing" port 1 and releasing the
> device associated resources.

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.

Hopefully all these errors propogate enough so that driver insmod fails
with a perfect clean up. Otherwise it is broken :|

Jason
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