linux-kernel - Re: [RFC v2 3/6] crypto: qat - address recursive dependency when fw signing is enabled

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Message-ID: <20150514193445.GW23057@wotan.suse.de>
Date:	Thu, 14 May 2015 21:34:45 +0200
From:	"Luis R. Rodriguez" <mcgrof@...e.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>,
	ming.lei@...onical.com, rusty@...tcorp.com.au,
	torvalds@...ux-foundation.org, dhowells@...hat.com,
	seth.forshee@...onical.com, linux-kernel@...r.kernel.org,
	pebolle@...cali.nl, linux-wireless@...r.kernel.org,
	gregkh@...uxfoundation.org, jlee@...e.com, tiwai@...e.de,
	casey@...aufler-ca.com, keescook@...omium.org, mjg59@...f.ucam.org,
	akpm@...ux-foundation.org, Kyle McMartin <kyle@...nel.org>,
	Bruce Allan <bruce.w.allan@...el.com>,
	Tadeusz Struk <tadeusz.struk@...el.com>,
	John Griffin <john.griffin@...el.com>
Subject: Re: [RFC v2 3/6] crypto: qat - address recursive dependency when fw
 signing is enabled

On Thu, May 14, 2015 at 11:04:15AM +0800, Herbert Xu wrote:
> On Wed, May 13, 2015 at 11:23:53AM -0700, Luis R. Rodriguez wrote:
> > From: "Luis R. Rodriguez" <mcgrof@...e.com>
> > 
> > We're going to add firmware module signing support, but when we do
> > this we end up with the following recursive dependency. Fix this by
> > just depending on FW_LOADER, which is typically always enabled
> > anyway. We do this as a compromise for now as FW_LOADER is only
> > selectable when EXPERT is enabled and the recursive dependency issue
> > below is actually real and valid, its proper fix however requires
> > a bit of work.
> > 
> > This technically means this change is likely welcomed for other
> > parts of the kernel but this is really only needed for now here.
> 
> Nack.  Either fix kbuild or make every user of FW_LOADER use
> a dependency.  Singling out a single crypto device makes zero
> sense.

I think that's fair... Paul, did you get to look into the
recursive issue some more by any chance? Any preference for
what path to take here?

  Luis
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