linux-kernel - Re: [PATCH v2 3/4] virtio: rng: delay hwrng

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Date:	Tue, 22 Jul 2014 07:43:20 -0400
From:	Jason Cooper <jason@...edaemon.net>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Amit Shah <amit.shah@...hat.com>, linux-kernel@...r.kernel.org,
	Virtualization List <virtualization@...ts.linux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>, keescook@...omium.org,
	Amos Kong <akong@...hat.com>
Subject: Re: [PATCH v2 3/4] virtio: rng: delay hwrng_register() till driver
 is ready

On Mon, Jul 21, 2014 at 08:41:24PM +0800, Herbert Xu wrote:
> On Mon, Jul 21, 2014 at 08:11:16AM -0400, Jason Cooper wrote:
> >
> > > @@ -136,15 +137,6 @@ static int probe_common(struct virtio_device *vdev)
> > >  		return err;
> > >  	}
> > >  
> > > -	err = hwrng_register(&vi->hwrng);
> > > -	if (err) {
> > > -		vdev->config->del_vqs(vdev);
> > > -		vi->vq = NULL;
> > > -		kfree(vi);
> > > -		ida_simple_remove(&rng_index_ida, index);
> > > -		return err;
> > > -	}
> > > -
> > 
> > This needs to stay.  register, and failure to do so, should occur in the
> > probe routine.
> 
> Why? 

hmm, yes. On reviewing the code, my objection was silly.  It mostly
stemmed from the commit message's mentioning of reduced error handling.

thx,

Jason.
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