From 0c966214589b9767fd8771b71328f83bac58cb25 Mon Sep 17 00:00:00 2001
From: Ed Cashin <ecashin@coraid.com>
Date: Thu, 4 Oct 2012 17:16:40 -0700
Subject: [PATCH] aoe: support more AoE addresses with dynamic block device
 minor numbers

The ATA over Ethernet protocol uses a major (shelf) and minor (slot)
address to identify a particular storage target.  These changes remove an
artificial limitation the aoe driver imposes on the use of AoE addresses.
For example, without these changes, the slot address has a maximum of 15,
but users commonly use slot numbers much greater than that.

The AoE shelf and slot address space is often used sparsely.  Instead of
using a static mapping between AoE addresses and the block device minor
number, the block device minor numbers are now allocated on demand.

Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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