sgi-xpc: XPC fails to discover partitions with all nasids above 128
authorRobin@sgi.com <Robin@sgi.com>
Wed, 24 Nov 2010 20:56:59 +0000 (12:56 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 24 Nov 2010 21:50:40 +0000 (06:50 +0900)
commitc22c7aeff69796f46ae0fcec141538e28f50b24e
tree4228d8fbd4edcb76ca7bdf5ae4e78242b03cc7cc
parent112bc2e120a94a511858918d6866a4978f9c500e
sgi-xpc: XPC fails to discover partitions with all nasids above 128

UV hardware defines 256 memory protection regions versus the baseline 64
with increasing size for the SN2 ia64.  This was overlooked when XPC was
modified to accomodate both UV and SN2.

Without this patch, a user could reconfigure their existing system and
suddenly disable cross-partition communications with no indication of what
has gone wrong.  It also prevents larger configurations from using
cross-partition communication.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/misc/sgi-xp/xpc_partition.c