File target-isns-dont-ignore-read-return-value.patch of Package target-isns.3375

diff -aurp target-isns-0.3.orig/src/isns.c target-isns-0.3/src/isns.c
--- target-isns-0.3.orig/src/isns.c	2014-12-02 16:18:53.604832276 -0800
+++ target-isns-0.3/src/isns.c	2014-12-02 16:27:36.457989304 -0800
@@ -1056,9 +1056,12 @@ void isns_registration_refresh(void)
 {
 	uint64_t count;
 
-	read(registration_timer_fd, &count, sizeof(count));
-	log_print(LOG_DEBUG, "refreshing registration");
-	isns_eid_attr_query();
+	if (read(registration_timer_fd, &count, sizeof(count)) >= 0) {
+		log_print(LOG_DEBUG, "refreshing registration");
+		isns_eid_attr_query();
+	} else
+		log_print(LOG_ERR, "regreshing registration failed: %s",
+			  strerror(errno));
 }
 
 static void isns_registration_set_period(uint32_t period)