9p-trans_fd: fix and clean up module init/exit paths

trans_fd leaked p9_mux_wq on module unload.  Fix it.  While at it,
collapse p9_mux_global_init() into p9_trans_fd_init().  It's easier to
follow this way and the global poll_tasks array is about to removed
anyway.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index f6d4af1..0b4eb5f 100644 (file)
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -238,22 +238,6 @@ static int p9_conn_rpcnb(struct p9_conn *m, struct p9_fcall *tc,
 
 static void p9_conn_cancel(struct p9_conn *m, int err);
 
-static int p9_mux_global_init(void)
-{
-       int i;
-
-       for (i = 0; i < ARRAY_SIZE(p9_mux_poll_tasks); i++)
-               p9_mux_poll_tasks[i].task = NULL;
-
-       p9_mux_wq = create_workqueue("v9fs");
-       if (!p9_mux_wq) {
-               printk(KERN_WARNING "v9fs: mux: creating workqueue failed\n");
-               return -ENOMEM;
-       }
-
-       return 0;
-}
-
 static u16 p9_mux_get_tag(struct p9_conn *m)
 {
        int tag;
@@ -1616,10 +1600,15 @@ static struct p9_trans_module p9_fd_trans = {
 
 int p9_trans_fd_init(void)
 {
-       int ret = p9_mux_global_init();
-       if (ret) {
-               printk(KERN_WARNING "9p: starting mux failed\n");
-               return ret;
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(p9_mux_poll_tasks); i++)
+               p9_mux_poll_tasks[i].task = NULL;
+
+       p9_mux_wq = create_workqueue("v9fs");
+       if (!p9_mux_wq) {
+               printk(KERN_WARNING "v9fs: mux: creating workqueue failed\n");
+               return -ENOMEM;
        }
 
        v9fs_register_trans(&p9_tcp_trans);
@@ -1634,4 +1623,6 @@ void p9_trans_fd_exit(void)
        v9fs_unregister_trans(&p9_tcp_trans);
        v9fs_unregister_trans(&p9_unix_trans);
        v9fs_unregister_trans(&p9_fd_trans);
+
+       destroy_workqueue(p9_mux_wq);
 }