From: Ed Cashin <ecashin@coraid.com>
Date: Fri, 5 Oct 2012 00:16:40 +0000 (-0700)
Subject: aoe: support more AoE addresses with dynamic block device minor numbers
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~12^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c966214589b9767fd8771b71328f83bac58cb25;p=pandora-kernel.git

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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