[DCCP] CCID: Allow ccid_{init,exit} to be NULL

Testing if the ccid being instantiated has these methods in
ccid_init().

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 1 insertions, 15 deletions

diff --git a/net/dccp/ccid.c b/net/dccp/ccid.c
index 9d8fc0e289ea..06b191a5740b 100644
--- a/net/dccp/ccid.c
+++ b/net/dccp/ccid.c
@@ -59,9 +59,6 @@ int ccid_register(struct ccid *ccid)
 {
         int err;
 
-        if (ccid->ccid_init == NULL)
-                return -1;
-
         ccids_write_lock();
         err = -EEXIST;
         if (ccids[ccid->ccid_id] == NULL) {
@@ -106,7 +103,7 @@ struct ccid *ccid_init(unsigned char id, struct sock *sk)
         if (!try_module_get(ccid->ccid_owner))
                 goto out_err;
 
-        if (ccid->ccid_init(sk) != 0)
+        if (ccid->ccid_init != NULL && ccid->ccid_init(sk) != 0)
                 goto out_module_put;
 out:
         ccids_read_unlock();
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 35d1d347541c..3c4779fa9432 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -76,15 +76,6 @@ static struct dccp_tx_hist *ccid3_tx_hist;
 static struct dccp_rx_hist *ccid3_rx_hist;
 static struct dccp_li_hist *ccid3_li_hist;
 
-static int ccid3_init(struct sock *sk)
-{
-        return 0;
-}
-
-static void ccid3_exit(struct sock *sk)
-{
-}
-
 /* TFRC sender states */
 enum ccid3_hc_tx_states {
         TFRC_SSTATE_NO_SENT = 1,
@@ -1182,8 +1173,6 @@ static struct ccid ccid3 = {
         .ccid_id                   = 3,
         .ccid_name                 = "ccid3",
         .ccid_owner                = THIS_MODULE,
-        .ccid_init                 = ccid3_init,
-        .ccid_exit                 = ccid3_exit,
         .ccid_hc_tx_init           = ccid3_hc_tx_init,
         .ccid_hc_tx_exit           = ccid3_hc_tx_exit,
         .ccid_hc_tx_send_packet    = ccid3_hc_tx_send_packet,