tree dc36d8716cc502aaac7e6159ffc1a307a4c5302d
parent 9bb237b6a670fa7a6af3adc65231b1f6fda44510
author Ed L. Cashin <ecashin@coraid.com> 1202473206 -0800
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1202491352 -0800

aoe: only install new AoE device once

An aoe driver user who had about 70 AoE targets found that he was hitting a
BUG in sysfs_create_file because the aoe driver was trying to tell the kernel
about an AoE device more than once.  Each AoE device was reachable by several
local network interfaces, and multiple ATA device indentify responses were
returning from that single device.

This patch eliminates a race condition so that aoe always informs the block
layer of a new AoE device once in the presence of multiple incoming ATA device
identify responses.

Signed-off-by: Ed L. Cashin <ecashin@coraid.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>