connection: add comment about wait_event

diff --git a/connection.c b/connection.c
index 67e432a0704024c7777cbcabf88eb9028e39ad67..9eb0bf9417ed46d5e600d1cef1e5c3c42d5e7201 100644 (file)
--- a/connection.c
+++ b/connection.c
@@ -1152,18 +1152,17 @@ int kdbus_conn_kmsg_send(struct kdbus_ep *ep,
                kdbus_conn_queue_insert(c, kmsg, NULL);
        mutex_unlock(&ep->bus->lock);
 
-       ret = kdbus_conn_queue_insert(conn_dst, kmsg, &offset);
-       if (ret < 0)
-               goto exit_unref;
-
-       BUG_ON(reply_wait && reply_wake);
-
        if (reply_wait) {
                u64 us = msg->timeout_ns;
                struct kdbus_cmd_recv recv = {};
 
                do_div(us, 1000ULL);
 
+               /*
+                * Block until the reply arrives. reply_wait is left untouched
+                * by the timeout scans that might be conducted for other,
+                * asynchronous replies of conn_src.
+                */
                if (!wait_event_interruptible_timeout(reply_wait->wait,
                                                      !reply_wait->waiting,
                                                      usecs_to_jiffies(us))) {