[SCTP] Change sctp_assoc_t to a sized type(s32).

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>

include/net/sctp/sctp.h

@@ -335,7 +335,7 @@ static inline void sctp_v6_exit(void) { return; }
 /* Map an association to an assoc_id. */
 static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
 {
-	return (asoc?asoc->assoc_id:NULL);
+	return (asoc?asoc->assoc_id:0);
 }
 
 /* Look up the association by its id.  */

include/net/sctp/user.h

@@ -55,7 +55,7 @@
 #include <linux/types.h>
 #include <linux/socket.h>
 
-typedef void * sctp_assoc_t;
+typedef __s32 sctp_assoc_t;
 
 /* The following symbols come from the Sockets API Extensions for
  * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.

net/sctp/associola.c

@@ -271,7 +271,7 @@ struct sctp_association *sctp_association_init(struct sctp_association *asoc,
 
 	asoc->need_ecne = 0;
 
-	asoc->assoc_id = (sctp_assoc_t)-1L;
+	asoc->assoc_id = 0;
 
 	/* Assume that peer would support both address types unless we are
 	 * told otherwise.
@@ -374,9 +374,9 @@ static void sctp_association_destroy(struct sctp_association *asoc)
 	sctp_endpoint_put(asoc->ep);
 	sock_put(asoc->base.sk);
 
-	if ((long)asoc->assoc_id != -1L) {
+	if (asoc->assoc_id != 0) {
 		spin_lock_bh(&sctp_assocs_id_lock);
-		idr_remove(&sctp_assocs_id, (long)asoc->assoc_id);
+		idr_remove(&sctp_assocs_id, asoc->assoc_id);
 		spin_unlock_bh(&sctp_assocs_id_lock);
 	}
 

net/sctp/socket.c

@@ -1063,7 +1063,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
 	struct sctp_sndrcvinfo default_sinfo = { 0 };
 	struct sctp_sndrcvinfo *sinfo;
 	struct sctp_initmsg *sinit;
-	sctp_assoc_t associd = NULL;
+	sctp_assoc_t associd = 0;
 	sctp_cmsgs_t cmsgs = { NULL };
 	int err;
 	sctp_scope_t scope;