Added in a sleep after we winkle in istep 18 to avoid race conditions

We are adding in a sleep to make sure that all the nodes are awake from
the winkle prior to writing the HRMOR in the core scratch register for
IPC to function properly.

CQ:SW433411
Change-Id: I01eb6c1005047c4c6eebe5c15db083e6ec9df1e0
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/60992
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Disable-CI: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: William G. Hoffa <wghoffa@us.ibm.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/usr/initservice/istepdispatcher/istepdispatcher.C b/src/usr/initservice/istepdispatcher/istepdispatcher.C
index 8e18d2177..47d0ebc76 100644
--- a/src/usr/initservice/istepdispatcher/istepdispatcher.C
+++ b/src/usr/initservice/istepdispatcher/istepdispatcher.C
@@ -2182,6 +2182,12 @@ void IStepDispatcher::handleProcFabIovalidMsg(msg_t * & io_pMsg)
                    "Returned from cpu_all_winkle." );
             }
 
+            //Temporary hack to sleep for 15 seconds to avoid race condition
+            //where other nodes are trying to read the core scratch registers
+            //while this node might not be out of winkle. To make it worse,
+            //if we fail in this case, we don't TI gracefully.
+            nanosleep(15,0);
+
             // identify IPC msg address to remote node(s)
             // this must be after the winkle call because the data is stored
             // in a core scom which will get lost