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>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 83160ab0d273..00dfc5008ad4 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -249,7 +249,7 @@ aoeblk_gdalloc(void *vp)
         q->queuedata = d;
         d->gd = gd;
         gd->major = AOE_MAJOR;
-        gd->first_minor = d->sysminor * AOE_PARTITIONS;
+        gd->first_minor = d->sysminor;
         gd->fops = &aoe_bdops;
         gd->private_data = d;
         set_capacity(gd, d->ssize);