linux-toradex.git/drivers/misc/sgi-xp, branch v2.6.27.25

sgi-xp: fix writing past the end of kzalloc()'d space

2009-02-12T17:31:03+00:00

commit 361916a943cd9dbda1c0b00879d0225cc919d868 upstream.

A missing type cast results in writing way beyond the end of a kzalloc()'d
memory segment resulting in slab corruption. But it seems like the better
solution is to define ->recv_msg_slots as a 'void *' rather than a
'struct xpc_notify_mq_msg_uv *' and add the type cast.

Signed-off-by: Dean Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

sgi-xpc: Remove NULL pointer dereference.

2009-02-02T16:28:14+00:00

commit 17e2161654da4e6bdfd8d53d4f52e820ee93f423 upstream.

If the bte copy fails, the attempt to retrieve payloads merely returns a
null pointer deref and not NULL as was expected.

Signed-off-by: Robin Holt 
Signed-off-by: Dean Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

sgi-xpc: ensure flags are updated before bte_copy

2009-02-02T16:28:14+00:00

commit 69b3bb65fa97a1e8563518dbbc35cd57beefb2d4 upstream.

The clearing of the msg->flags needs a barrier between it and the notify
of the channel threads that the messages are cleaned and ready for use.

Signed-off-by: Robin Holt 
Signed-off-by: Dean Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

sgi-xp: eliminate false detection of no heartbeat

2009-01-25T00:36:24+00:00

commit 158bc69effbf96f59c01cdeb20f8d4c184e59f8e upstream.

After XPC has been up and running on multiple partitions for any length of
time, if XPC on one of the partitions is stopped and restarted (either by
a rmmod/insmod or a system restart), it is possible for the XPCs running
on the other partitions to falsely detect a lack of heartbeat from the XPC
that was just restarted.  This false detection will occur if the restarted
XPC comes up within the five-seconds preceding one of the other XPC's
heartbeat check (which occurs once every twenty seconds).

The detection of no heartbeat results in the detecting XPC deactivating
from the just restarted XPC.  The only remedy is to restart one of the
XPCs and hope that one doesn't hit this five-second window on any of the
other partitions.

Signed-off-by: Dean Nelson 
Signed-off-by: Robin Holt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

sgi-xp: setup the notify GRU message queue

2008-07-30T16:41:50+00:00

Setup the notify GRU message queue that is used for sending user messages
on UV systems.

Signed-off-by: Dean Nelson 
Cc: Jack Steiner 
Cc: "Luck, Tony" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sgi-xp: setup the activate GRU message queue

2008-07-30T16:41:50+00:00

Setup the activate GRU message queue that is used for partition activation
and channel connection on UV systems.

Signed-off-by: Dean Nelson 
Cc: Jack Steiner 
Cc: "Luck, Tony" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sgi-xp: cleanup naming of partition defines

2008-07-30T16:41:50+00:00

Cleanup naming of partition defines.

Signed-off-by: Dean Nelson 
Cc: Jack Steiner 
Cc: "Luck, Tony" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sgi-xp: move xpc_check_remote_hb() to support both SN2 and UV

2008-07-30T16:41:50+00:00

Move xpc_check_remote_hb() so it can support both SN2 and UV.

Signed-off-by: Dean Nelson 
Cc: Jack Steiner 
Cc: "Luck, Tony" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sgi-xp: add usage of GRU driver by xpc_remote_memcpy()

2008-07-30T16:41:50+00:00

Add UV support to xpc_remote_memcpy(), which involves interfacing to the
GRU driver.

Signed-off-by: Dean Nelson 
Cc: Jack Steiner 
Cc: "Luck, Tony" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sgi-xp: enable building of XPC/XPNET on x86_64

2008-07-30T16:41:50+00:00

Get XPC/XPNET to build on x86_64.  Trying to modprobe them up on a non-UV
or sn2 system will result in a -ENODEV.

Signed-off-by: Dean Nelson 
Cc: Jack Steiner 
Cc: "Luck, Tony" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds