From 387e2b0439026aa738a9edca15a57e5c0bcb4dfc Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Tue, 23 May 2006 15:20:25 -0700 Subject: [PATCH] [BRIDGE]: need to ref count the LLC sap Bridge will OOPS on removal if other application has the SAP open. The bridge SAP might be shared with other usages, so need to do reference counting on module removal rather than explicit close/delete. Since packet might arrive after or during removal, need to clear the receive function handle, so LLC only hands it to user (if any). Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/bridge/br.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/bridge/br.c b/net/bridge/br.c index 22d806cf40c..12da21afb9c 100644 --- a/net/bridge/br.c +++ b/net/bridge/br.c @@ -55,7 +55,7 @@ static int __init br_init(void) static void __exit br_deinit(void) { - llc_sap_close(br_stp_sap); + rcu_assign_pointer(br_stp_sap->rcv_func, NULL); #ifdef CONFIG_BRIDGE_NETFILTER br_netfilter_fini(); @@ -67,6 +67,7 @@ static void __exit br_deinit(void) synchronize_net(); + llc_sap_put(br_stp_sap); br_fdb_get_hook = NULL; br_fdb_put_hook = NULL; -- 2.20.1