[PATCH] return 0 if distance_table is NULL

Upstream-Status: Pending

read_distance_table() maybe return 0, but distance_table is not set,
if distance_table is used, and will lead to SEGFAULT

Signed-off-by: Roy Li <rongqing.li@windriver.com>
---
 distance.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/distance.c b/distance.c
index 4a26972..c6ca021 100755
--- a/distance.c
+++ b/distance.c
@@ -113,6 +113,8 @@ int numa_distance(int a, int b)
 		int err = read_distance_table();
 		if (err < 0)
 			return 0;
+		if (!distance_table)
+			return 0;
 	}
 	return distance_table[a * distance_numnodes + b];
 }
-- 
1.7.10.4