tipc: Remove deferred queue head caching during broadcast message reception
Modifies TIPC's incoming broadcast packet handler so that it no longer
pre-reads information about the deferred packet queue, since the cached
value is unreliable once the associated node lock has been released.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index bc01ca6..8d29852 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -467,7 +467,6 @@
/* Handle in-sequence broadcast message */
receive:
- deferred = node->bclink.deferred_head;
next_in = mod(node->bclink.last_in + 1);
seqno = msg_seqno(msg);
@@ -500,6 +499,7 @@
}
buf = NULL;
tipc_node_lock(node);
+ deferred = node->bclink.deferred_head;
if (deferred && (buf_seqno(deferred) == mod(next_in + 1))) {
buf = deferred;
msg = buf_msg(buf);