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authorYing Xue <ying.xue@windriver.com>2014-02-20 07:32:50 +0400
committerDavid S. Miller <davem@davemloft.net>2014-02-22 09:00:15 +0400
commit970122fdf4b2d79c708022f2fdc0ab3840311d87 (patch)
treef79e78be18af6890b71aa833161b6ca4cc4576b3 /net/tipc/core.c
parent9fe7ed474956944443eec57c5f75be12e10da84e (diff)
downloadlinux-970122fdf4b2d79c708022f2fdc0ab3840311d87.tar.xz
tipc: make bearer set up in module insertion stage
Accidentally a side effect is involved by commit 6e967adf7(tipc: relocate common functions from media to bearer). Now tipc stack handler of receiving packets from netdevices as well as netdevice notification handler are registered when bearer is enabled rather than tipc module initialization stage, but the two handlers are both unregistered in tipc module exit phase. If tipc module is inserted and then immediately removed, the following warning message will appear: "dev_remove_pack: ffffffffa0380940 not found" This is because in module insertion stage tipc stack packet handler is not registered at all, but in module exit phase dev_remove_pack() needs to remove it. Of course, dev_remove_pack() cannot find tipc protocol handler from the kernel protocol handler list so that the warning message is printed out. But if registering the two handlers is adjusted from enabling bearer phase into inserting module stage, the warning message will be eliminated. Due to this change, tipc_core_start_net() and tipc_core_stop_net() can be deleted as well. Reported-by: Wang Weidong <wangweidong1@huawei.com> Cc: Jon Maloy <jon.maloy@ericsson.com> Cc: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/core.c')
-rw-r--r--net/tipc/core.c38
1 files changed, 9 insertions, 29 deletions
diff --git a/net/tipc/core.c b/net/tipc/core.c
index cfd9cc150110..80c20647b3d2 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -77,37 +77,13 @@ struct sk_buff *tipc_buf_acquire(u32 size)
}
/**
- * tipc_core_stop_net - shut down TIPC networking sub-systems
- */
-static void tipc_core_stop_net(void)
-{
- tipc_net_stop();
- tipc_bearer_cleanup();
-}
-
-/**
- * start_net - start TIPC networking sub-systems
- */
-int tipc_core_start_net(unsigned long addr)
-{
- int res;
-
- tipc_net_start(addr);
- res = tipc_bearer_setup();
- if (res < 0)
- goto err;
- return res;
-
-err:
- tipc_core_stop_net();
- return res;
-}
-
-/**
* tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
*/
static void tipc_core_stop(void)
{
+ tipc_handler_stop();
+ tipc_net_stop();
+ tipc_bearer_cleanup();
tipc_netlink_stop();
tipc_cfg_stop();
tipc_subscr_stop();
@@ -158,7 +134,13 @@ static int tipc_core_start(void)
if (err)
goto out_cfg;
+ err = tipc_bearer_setup();
+ if (err)
+ goto out_bearer;
+
return 0;
+out_bearer:
+ tipc_cfg_stop();
out_cfg:
tipc_subscr_stop();
out_subscr:
@@ -203,8 +185,6 @@ static int __init tipc_init(void)
static void __exit tipc_exit(void)
{
- tipc_handler_stop();
- tipc_core_stop_net();
tipc_core_stop();
pr_info("Deactivated\n");
}