nl80211: propagate netlink errors to callers

Adjust nl80211_send() to propagate errors back to the caller and do not
free message and callbacks in send error case anymore since all callsites
immediately invoke nl80211_free() anyway.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/iwinfo_nl80211.c b/iwinfo_nl80211.c
index e3a7e4d..3d9ee73 100644 (file)
--- a/iwinfo_nl80211.c
+++ b/iwinfo_nl80211.c
@@ -369,10 +369,10 @@ nla_put_failure:
        return NULL;
 }
 
-static struct nl80211_msg_conveyor * nl80211_send(
-       struct nl80211_msg_conveyor *cv,
-       int (*cb_func)(struct nl_msg *, void *), void *cb_arg
-) {
+static int nl80211_send(struct nl80211_msg_conveyor *cv,
+                        int (*cb_func)(struct nl_msg *, void *),
+                        void *cb_arg)
+{
        static struct nl80211_msg_conveyor rcv;
        int err = 1;
 
@@ -381,8 +381,10 @@ static struct nl80211_msg_conveyor * nl80211_send(
        else
                nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
 
-       if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
-               goto err;
+       err = nl_send_auto_complete(nls->nl_sock, cv->msg);
+
+       if (err < 0)
+               goto out;
 
        nl_cb_err(cv->cb,               NL_CB_CUSTOM, nl80211_msg_error,  &err);
        nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
@@ -391,13 +393,8 @@ static struct nl80211_msg_conveyor * nl80211_send(
        while (err > 0)
                nl_recvmsgs(nls->nl_sock, cv->cb);
 
-       return &rcv;
-
-err:
-       nl_cb_put(cv->cb);
-       nlmsg_free(cv->msg);
-
-       return NULL;
+out:
+       return err;
 }
 
 static struct nlattr ** nl80211_parse(struct nl_msg *msg)