xive: Cache scrub needs a sync

After a scrub, use a sync to order any load to the newly updated
memory.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/hw/xive.c b/hw/xive.c
index ab8955c..a126c4c 100644
--- a/hw/xive.c
+++ b/hw/xive.c
@@ -1229,6 +1229,7 @@ static int64_t __xive_cache_scrub(struct xive *x, enum xive_cache_type ctype,
 		/* Small delay */
 		time_wait(100);
 	}
+	sync();
 	return 0;
 }