From: Allan Stephens Date: Mon, 24 Oct 2011 17:05:55 +0000 (-0400) Subject: tipc: Handle broadcast attempt when no neighboring nodes exist X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2b78f9a002dccc587912af4da3bf1db86909de91;p=linux-beck.git tipc: Handle broadcast attempt when no neighboring nodes exist Adds a check to detect when an attempt is made to send a message via the broadcast link and no neighboring nodes are currently available to receive it. Rather than wasting effort passing the message to the broadcast link and broadcast bearer, who will only throw it away, TIPC now frees the message immediately and reports success (i.e. the message has been delivered to all available destinations). Signed-off-by: Allan Stephens Signed-off-by: Paul Gortmaker --- diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index 5ca8fdda63ca..8f58df24bac5 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -417,13 +417,19 @@ int tipc_bclink_send_msg(struct sk_buff *buf) spin_lock_bh(&bc_lock); + if (!bclink->bcast_nodes.count) { + res = msg_data_sz(buf_msg(buf)); + buf_discard(buf); + goto exit; + } + res = tipc_link_send_buf(bcl, buf); if (likely(res > 0)) bclink_set_last_sent(); bcl->stats.queue_sz_counts++; bcl->stats.accu_queue_sz += bcl->out_queue_size; - +exit: spin_unlock_bh(&bc_lock); return res; }