zcip: do not query current time if we won't use the result

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/networking/zcip.c b/networking/zcip.c
index d15c67d55d10f6630fe0b438a81b7455e08ffd8a..f0e7342830f527316591be647207c4b4ba097df6 100644 (file)
--- a/networking/zcip.c
+++ b/networking/zcip.c
@@ -361,8 +361,10 @@ int zcip_main(int argc UNUSED_PARAM, char **argv)
                        // make the kernel filter out all packets except
                        // ones we'd care about.
                }
-               // Set deadline_us to the point in time when we timeout
-               deadline_us = MONOTONIC_US() + timeout_ms * 1000;
+               if (timeout_ms >= 0) {
+                       // Set deadline_us to the point in time when we timeout
+                       deadline_us = MONOTONIC_US() + timeout_ms * 1000;
+               }
 
                VDBG("...wait %d %s nsent=%u\n",
                                timeout_ms, argv_intf, nsent);