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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 25 Sep 2014 16:10:51 +0200
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Subject: Re: [Qemu-devel] [PATCH 25/30] usb-bot: drop not needed
	"allow_hotplug = 0"
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To: Igor Mammedov <imammedo@redhat.com>
Cc: dmitry@daynix.com, mst@redhat.com, agraf@suse.de, qemu-devel@nongnu.org, cornelia.huck@de.ibm.com, amit.shah@redhat.com, Paolo Bonzini <pbonzini@redhat.com>, borntraeger@de.ibm.com, rth@twiddle.net

On Do, 2014-09-25 at 10:12 +0200, Igor Mammedov wrote:

> > Basically the same camp as usb-bot.  UAS doesn't suffer the LUN
> > numeration issue which BOT has, but there likewise is no signaling about
> > scsi devices coming and going.
> Thet's why a excluded UAS from this series,
> Do I need to make it hotpluggable (like SCSI HBAs without hotplug
> signalling)? /i.e./ it would be possible to hotplug it but guest
> won't notice the new drive on UAS until reboot/

Yes, in that regard uas is more simliar to lsi than to bot.  Hotplug
works, but needs manual rescan / driver reload / reboot to make the
guest see the device.

cheers,
  Gerd