1 files changed, 8 insertions, 1 deletions

diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index a7171997adfd..04fd55a6e461 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -1098,7 +1098,14 @@ static int __init grab_mblocks(struct mdesc_handle *md)
                 m->size = *val;
                 val = mdesc_get_property(md, node,
                                          "address-congruence-offset", NULL);
-                m->offset = *val;
+
+                /* The address-congruence-offset property is optional.
+                 * Explicity zero it be identifty this.
+                 */
+                if (val)
+                        m->offset = *val;
+                else
+                        m->offset = 0UL;
 
                 numadbg("MBLOCK[%d]: base[%llx] size[%llx] offset[%llx]\n",
                         count - 1, m->base, m->size, m->offset);