diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_user.h b/drivers/staging/lustre/lustre/include/lustre/lustre_user.h
index 80f8ec529424..8ed4558238fc 100644
--- a/drivers/staging/lustre/lustre/include/lustre/lustre_user.h
+++ b/drivers/staging/lustre/lustre/include/lustre/lustre_user.h
@@ -1063,23 +1063,21 @@ struct hsm_action_item {
  * \retval buffer
  */
 static inline char *hai_dump_data_field(struct hsm_action_item *hai,
-					char *buffer, int len)
+					char *buffer, size_t len)
 {
-	int i, sz, data_len;
+	int i, data_len;
 	char *ptr;
 
 	ptr = buffer;
-	sz = len;
 	data_len = hai->hai_len - sizeof(*hai);
-	for (i = 0 ; (i < data_len) && (sz > 0) ; i++) {
-		int cnt;
-
-		cnt = snprintf(ptr, sz, "%.2X",
-			       (unsigned char)hai->hai_data[i]);
-		ptr += cnt;
-		sz -= cnt;
+	for (i = 0; (i < data_len) && (len > 2); i++) {
+		snprintf(ptr, 3, "%02X", (unsigned char)hai->hai_data[i]);
+		ptr += 2;
+		len -= 2;
 	}
+
 	*ptr = '\0';
+
 	return buffer;
 }