[PATCHv2] NVMe: Allow user initiated rescan

[Johannes Thumshirn]

On Thu, May 12, 2016 at 07:58:17AM -0600, Keith Busch wrote:
> This exposes ioctl and sysfs methods a user can invoke to request the
> driver rescan a controller and its namespaces. This is less harsh than
> doing a controller reset, which temporarilly halts all IO, just to
> surface a newly attached namespace.
> 
> This is mainly useful for controllers that implement the namespace
> management command, but do not support the namespace notify change
> asynchronous event notification.
> 
> Signed-off-by: Keith Busch <keith.busch at intel.com>

Still looks OK for me,
Reviewed-by: Johannes Thumshirn <jthumshirn at suse.de>

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