X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=lib%2Fscatterlist.c;h=a685c8a79578b274cb361d442b953507e58d7d63;hb=72c1c2f1be6b6574c434bd60991269786c2431a2;hp=129a82f707df9b08d7c8e777561fca30c579816c;hpb=df642cea25c90dc7d5dcd9d3b480b6b59de7d787;p=~andy%2Flinux

diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 129a82f707d..a685c8a7957 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -247,13 +247,15 @@ int __sg_alloc_table(struct sg_table *table, unsigned int nents,
 	struct scatterlist *sg, *prv;
 	unsigned int left;
 
+	memset(table, 0, sizeof(*table));
+
+	if (nents == 0)
+		return -EINVAL;
 #ifndef ARCH_HAS_SG_CHAIN
 	if (WARN_ON_ONCE(nents > max_ents))
 		return -EINVAL;
 #endif
 
-	memset(table, 0, sizeof(*table));
-
 	left = nents;
 	prv = NULL;
 	do {