RDMA/siw: Introduce siw_destroy_cep_sock

Add one helper to simplify code a bit.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202310091735.oG7bTvLR-lkp@intel.com/`Acked-by: Bernard Metzler <bmt@zurich.ibm.com>
Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Link: https://lore.kernel.org/r/20231113115726.12762-17-guoqing.jiang@linux.devSigned-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/sw/siw/siw_cm.c

@@ -367,6 +367,15 @@ static void siw_free_cm_id(struct siw_cep *cep)
 	cep->cm_id = NULL;
 }
 
+static void siw_destroy_cep_sock(struct siw_cep *cep)
+{
+	if (cep->sock) {
+		siw_socket_disassoc(cep->sock);
+		sock_release(cep->sock);
+		cep->sock = NULL;
+	}
+}
+
 /*
  * siw_qp_cm_drop()
  *
@@ -423,14 +432,7 @@ void siw_qp_cm_drop(struct siw_qp *qp, int schedule)
 		}
 		cep->state = SIW_EPSTATE_CLOSED;
 
-		if (cep->sock) {
-			siw_socket_disassoc(cep->sock);
-			/*
-			 * Immediately close socket
-			 */
-			sock_release(cep->sock);
-			cep->sock = NULL;
-		}
+		siw_destroy_cep_sock(cep);
 		if (cep->qp) {
 			cep->qp = NULL;
 			siw_qp_put(qp);
@@ -1693,9 +1695,7 @@ int siw_accept(struct iw_cm_id *id, struct iw_cm_conn_param *params)
 error_unlock:
 	up_write(&qp->state_lock);
 error:
-	siw_socket_disassoc(cep->sock);
-	sock_release(cep->sock);
-	cep->sock = NULL;
+	siw_destroy_cep_sock(cep);
 
 	cep->state = SIW_EPSTATE_CLOSED;
 
@@ -1740,9 +1740,7 @@ int siw_reject(struct iw_cm_id *id, const void *pdata, u8 pd_len)
 		cep->mpa.hdr.params.bits |= MPA_RR_FLAG_REJECT; /* reject */
 		siw_send_mpareqrep(cep, pdata, pd_len);
 	}
-	siw_socket_disassoc(cep->sock);
-	sock_release(cep->sock);
-	cep->sock = NULL;
+	siw_destroy_cep_sock(cep);
 
 	cep->state = SIW_EPSTATE_CLOSED;