netdev - Re: [PATCH v2 03/13] Provider Methods and Data Structures

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Message-Id: <1165249706.32724.35.camel@stevo-desktop>
Date:	Mon, 04 Dec 2006 10:28:25 -0600
From:	Steve Wise <swise@...ngridcomputing.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	rdreier@...co.com, netdev@...r.kernel.org,
	openib-general@...nib.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH  v2 03/13] Provider Methods and Data Structures

On Sun, 2006-12-03 at 13:07 +0100, Arjan van de Ven wrote:
> On Sat, 2006-12-02 at 16:49 -0600, Steve Wise wrote:
> 
> > +
> > +static struct ib_ah *iwch_ah_create(struct ib_pd *pd,
> > +				    struct ib_ah_attr *ah_attr)
> > +{
> > +	return ERR_PTR(-ENOSYS);
> > +}
> 
> 
> -ENOSYS is just about ALWAYS a bug in that it's guaranteed to be the
> wrong error code ;)

This is a method that is not supported by the iWARP transport.  ENOSYS
indicates this.  I _think_ this is SOP for the infinband subsystem.

Roland, I think at one time we were talking about changing the Core to
better handle this?  Either with attributes/capabilities that the low
level driver can set, or by set these method ptrs to NULL and the core
should handle it in the wrapper function...

Steve.

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