iw: don't use NULL pointer in nla_nest_end()

[thirdparty/iw.git] / event.c

diff --git a/event.c b/event.c
index 5fb5afc6c4dd95a804abd75e463e05d5997de971..896f03ab7636a49b3e477581fa3744175437e27c 100644 (file)
--- a/event.c
+++ b/event.c
@@ -45,12 +45,14 @@ static void print_frame(struct print_event_args *args, struct nlattr *attr)
 {
        uint8_t *frame;
        size_t len;
-       int i;
+       unsigned int i;
        char macbuf[6*3];
        uint16_t tmp;
 
-       if (!attr)
+       if (!attr) {
                printf(" [no frame]");
+               return;
+       }
 
        frame = nla_data(attr);
        len = nla_len(attr);
@@ -773,7 +775,7 @@ static int print_events(struct nl80211_state *state,
 
        return __do_listen_events(state, 0, NULL, &args);
 }
-TOPLEVEL(event, "[-t] [-r] [-f]", 0, 0, CIB_NONE, print_events,
+TOPLEVEL(event, "[-t|-r] [-f]", 0, 0, CIB_NONE, print_events,
        "Monitor events from the kernel.\n"
        "-t - print timestamp\n"
        "-r - print relative timstamp\n"