linux-kernel - Re: [3.16 stable PATCH 1/1] virtio-rng: fix multi-device startup

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Date:	Tue, 12 Aug 2014 12:23:23 +0530
From:	Amit Shah <amit.shah@...hat.com>
To:	Greg KH <greg@...ah.com>
Cc:	stable@...r.kernel.org, Amos Kong <akong@...hat.com>,
	Virtualization List <virtualization@...ts.linux-foundation.org>,
	linux-kernel@...r.kernel.org, Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [3.16 stable PATCH 1/1] virtio-rng: fix multi-device startup

On (Tue) 12 Aug 2014 [13:55:48], Greg KH wrote:
> On Tue, Aug 12, 2014 at 11:01:58AM +0530, Amit Shah wrote:
> > On (Tue) 12 Aug 2014 [06:55:27], Greg KH wrote:
> > > On Mon, Aug 11, 2014 at 06:11:47PM +0530, Amit Shah wrote:
> > > > This is a 3.16-only patch.  The linux.git fix is
> > > > 5c06273401f2eb7b290cadbae18ee00f8f65e893, which fixes this issue in a
> > > > different way.
> > > 
> > > Why "different"?  Why can't I take that original patch instead?  What is
> > > different in this patch, and why?
> > 
> > The commit referenced moves the hwrng_register() call to the ->scan()
> > callback instead of it being in probe().  This was done to ensure the
> > virtio-rng devices can contribute to the initial system entropy
> > introduced in commit d9e7972619334.
> > 
> > That patch is quite small too, but will need a slight conflict
> > resolution due to the previous two code-shuffling patches, and also
> > the following revert.
> > 
> > However, I decided against the backport of the ->scan() method, since
> > it wasn't designed to solve this regression, it happens to solve it,
> > and it actually introduces new functionality.  I would be happy to
> > provide a backport of the relevant patches, if you think that would be
> > alright.
> 
> I almost always want "original" patches as it causes less bugs overall,
> and less confusion for everyone involved.  Taking 2-3 patches is just as
> easy as 1 patch, and even easier if I don't have to review it as "hard"
> due to it not differing from what is in Linus's tree.

Thanks; I'll send a backport of the patches, then.

		Amit
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