IB/rxe: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Moni Shoua <monis@mellanox.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: linux-rdma@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/sw/rxe/rxe_comp.c

@@ -136,9 +136,9 @@ static enum ib_wc_opcode wr_to_wc_opcode(enum ib_wr_opcode opcode)
 	}
 }
 
-void retransmit_timer(unsigned long data)
+void retransmit_timer(struct timer_list *t)
 {
-	struct rxe_qp *qp = (struct rxe_qp *)data;
+	struct rxe_qp *qp = from_timer(qp, t, retrans_timer);
 
 	if (qp->valid) {
 		qp->comp.timeout = 1;

drivers/infiniband/sw/rxe/rxe_loc.h

@@ -218,8 +218,8 @@ static inline void rxe_advance_resp_resource(struct rxe_qp *qp)
 		qp->resp.res_head = 0;
 }
 
-void retransmit_timer(unsigned long data);
-void rnr_nak_timer(unsigned long data);
+void retransmit_timer(struct timer_list *t);
+void rnr_nak_timer(struct timer_list *t);
 
 /* rxe_srq.c */
 #define IB_SRQ_INIT_MASK (~IB_SRQ_LIMIT)

drivers/infiniband/sw/rxe/rxe_qp.c

@@ -275,8 +275,8 @@ static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 
 	qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 	if (init->qp_type == IB_QPT_RC) {
-		setup_timer(&qp->rnr_nak_timer, rnr_nak_timer, (unsigned long)qp);
-		setup_timer(&qp->retrans_timer, retransmit_timer, (unsigned long)qp);
+		timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
+		timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 	}
 	return 0;
 }

drivers/infiniband/sw/rxe/rxe_req.c

@@ -118,9 +118,9 @@ static void req_retry(struct rxe_qp *qp)
 	}
 }
 
-void rnr_nak_timer(unsigned long data)
+void rnr_nak_timer(struct timer_list *t)
 {
-	struct rxe_qp *qp = (struct rxe_qp *)data;
+	struct rxe_qp *qp = from_timer(qp, t, rnr_nak_timer);
 
 	pr_debug("qp#%d rnr nak timer fired\n", qp_num(qp));
 	rxe_run_task(&qp->req.task, 1);