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

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Message-ID: <20150414154012.GA13852@phlsvsds.ph.intel.com>
Date:	Tue, 14 Apr 2015 11:40:13 -0400
From:	"ira.weiny" <ira.weiny@...el.com>
To:	Michael Wang <yun.wang@...fitbricks.com>
Cc:	Jason Gunthorpe <jgunthorpe@...idianresearch.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 04:32:57PM +0200, Michael Wang wrote:
> 
> 
> On 04/14/2015 04:18 PM, ira.weiny wrote:
> [snip]
> >  
> >  /**
> > - * cap_ib_cm_dev - Check if any port of device has the capability Infiniband
> > - * Communication Manager.
> > + * cap_ib_cm_any_port - Check if any port of the device has Infiniband
> > + * Communication Manager (CM) support.
> >   *
> >   * @device: Device to be checked
> >   *
> > - * Return 0 when all port of the device don't support Infiniband
> > - * Communication Manager.
> > + * Return 1 if any port of the device supports the IB CM.
> >   */
> > -static inline int cap_ib_cm_dev(struct ib_device *device)
> > +static inline int cap_ib_cm_any_port(struct ib_device *device)
> >  {
> >         int i;
> 
> I think we maybe able to get rid of this helper according to Sean's suggestion :-)
> 
> We just need to check the port 1 of HCA see if it support ib cm, seems like
> currently there is no case that port 1 support cm while others doesn't.

But that moves us in the wrong direction.  If we later support port 2 without
port 1 that code will be broken.

Ira

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