[PATCH] nvme: support bi-directional commands

[Keith Busch]

On Wed, Dec 07, 2016 at 06:44:27PM +0100, Christoph Hellwig wrote:
> On Wed, Dec 07, 2016 at 12:50:50PM -0500, Keith Busch wrote:
> > NVMe defines this capability, so why would we want to make it unreachable
> > in Linux?
> 
> NVMe defines no user of it, so that defintion is entirely theoretical
> and it's a giant mess

It defines the use, but no user today. We can burn that bridge when we
get there.