net: remove redundant check for timer pending state before del_timer

As in del_timer() there has already placed a timer_pending() function
to check whether the timer to be deleted is pending or not, it's
unnecessary to check timer pending state again before del_timer() is
called.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 10 insertions, 19 deletions

diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index b45ed1f..2f95f5a 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -434,8 +434,7 @@ void sctp_association_free(struct sctp_association *asoc)
 	 * on our state.
 	 */
 	for (i = SCTP_EVENT_TIMEOUT_NONE; i < SCTP_NUM_TIMEOUT_TYPES; ++i) {
-		if (timer_pending(&asoc->timers[i]) &&
-		    del_timer(&asoc->timers[i]))
+		if (del_timer(&asoc->timers[i]))
 			sctp_association_put(asoc);
 	}
 
@@ -1497,7 +1496,7 @@ void sctp_assoc_rwnd_increase(struct sctp_association *asoc, unsigned int len)
 
 		/* Stop the SACK timer.  */
 		timer = &asoc->timers[SCTP_EVENT_TIMEOUT_SACK];
-		if (timer_pending(timer) && del_timer(timer))
+		if (del_timer(timer))
 			sctp_association_put(asoc);
 	}
 }
diff --git a/net/sctp/input.c b/net/sctp/input.c
index 8bd3c27..965bbbb 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -468,8 +468,7 @@ void sctp_icmp_proto_unreachable(struct sock *sk,
 	} else {
 		struct net *net = sock_net(sk);
 
-		if (timer_pending(&t->proto_unreach_timer) &&
-		    del_timer(&t->proto_unreach_timer))
+		if (del_timer(&t->proto_unreach_timer))
 			sctp_association_put(asoc);
 
 		sctp_do_sm(net, SCTP_EVENT_T_OTHER,
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index 9bcdbd0..01dca75 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -1700,10 +1700,8 @@ static void sctp_check_transmitted(struct sctp_outq *q,
 		 * address.
 		 */
 		if (!transport->flight_size) {
-			if (timer_pending(&transport->T3_rtx_timer) &&
-			    del_timer(&transport->T3_rtx_timer)) {
+			if (del_timer(&transport->T3_rtx_timer))
 				sctp_transport_put(transport);
-			}
 		} else if (restart_timer) {
 			if (!mod_timer(&transport->T3_rtx_timer,
 				       jiffies + transport->rto))
diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index c957775..8aab894 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -674,10 +674,8 @@ static void sctp_cmd_t3_rtx_timers_stop(sctp_cmd_seq_t *cmds,
 
 	list_for_each_entry(t, &asoc->peer.transport_addr_list,
 			transports) {
-		if (timer_pending(&t->T3_rtx_timer) &&
-		    del_timer(&t->T3_rtx_timer)) {
+		if (del_timer(&t->T3_rtx_timer))
 			sctp_transport_put(t);
-		}
 	}
 }
 
@@ -1517,7 +1515,7 @@ static int sctp_cmd_interpreter(sctp_event_t event_type,
 
 		case SCTP_CMD_TIMER_STOP:
 			timer = &asoc->timers[cmd->obj.to];
-			if (timer_pending(timer) && del_timer(timer))
+			if (del_timer(timer))
 				sctp_association_put(asoc);
 			break;
 
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index ca5331c..fafd2a4 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -151,13 +151,11 @@ void sctp_transport_free(struct sctp_transport *transport)
 	 * structure hang around in memory since we know
 	 * the tranport is going away.
 	 */
-	if (timer_pending(&transport->T3_rtx_timer) &&
-	    del_timer(&transport->T3_rtx_timer))
+	if (del_timer(&transport->T3_rtx_timer))
 		sctp_transport_put(transport);
 
 	/* Delete the ICMP proto unreachable timer if it's active. */
-	if (timer_pending(&transport->proto_unreach_timer) &&
-	    del_timer(&transport->proto_unreach_timer))
+	if (del_timer(&transport->proto_unreach_timer))
 		sctp_association_put(transport->asoc);
 
 	sctp_transport_put(transport);
@@ -655,10 +653,9 @@ void sctp_transport_reset(struct sctp_transport *t)
 void sctp_transport_immediate_rtx(struct sctp_transport *t)
 {
 	/* Stop pending T3_rtx_timer */
-	if (timer_pending(&t->T3_rtx_timer)) {
-		(void)del_timer(&t->T3_rtx_timer);
+	if (del_timer(&t->T3_rtx_timer))
 		sctp_transport_put(t);
-	}
+
 	sctp_retransmit(&t->asoc->outqueue, t, SCTP_RTXR_T3_RTX);
 	if (!timer_pending(&t->T3_rtx_timer)) {
 		if (!mod_timer(&t->T3_rtx_timer, jiffies + t->rto))