Documentation/accounting/getdelays.c: handle sendto() failures

Fixes

  Documentation/accounting/getdelays.c: In function `get_family_id':
  Documentation/accounting/getdelays.c:172:14: warning: variable `rc' set but not used [-Wunused-but-set-variable]

Reported-by: "Justin P. Mattock" <justinmattock@gmail.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/Documentation/accounting/getdelays.c b/Documentation/accounting/getdelays.c
index 16e16d57b9eb26688228c5bdfdbf08698c60d48a..fed225401dd2bd8622db3e347b8834c019271813 100644 (file)
--- a/Documentation/accounting/getdelays.c
+++ b/Documentation/accounting/getdelays.c
@@ -177,6 +177,8 @@ static int get_family_id(int sd)
        rc = send_cmd(sd, GENL_ID_CTRL, getpid(), CTRL_CMD_GETFAMILY,
                        CTRL_ATTR_FAMILY_NAME, (void *)name,
                        strlen(TASKSTATS_GENL_NAME)+1);
+       if (rc < 0)
+               return 0;       /* sendto() failure? */
 
        rep_len = recv(sd, &ans, sizeof(ans), 0);
        if (ans.n.nlmsg_type == NLMSG_ERROR ||