diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index b56676be07c7..f60e35576526 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -733,6 +733,7 @@ extern const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5];
 enum rxrpc_timer_trace {
 	rxrpc_timer_begin,
 	rxrpc_timer_init_for_reply,
+	rxrpc_timer_init_for_send_reply,
 	rxrpc_timer_expired,
 	rxrpc_timer_set_for_ack,
 	rxrpc_timer_set_for_ping,
@@ -749,6 +750,7 @@ enum rxrpc_propose_ack_trace {
 	rxrpc_propose_ack_ping_for_lost_ack,
 	rxrpc_propose_ack_ping_for_lost_reply,
 	rxrpc_propose_ack_ping_for_params,
+	rxrpc_propose_ack_processing_op,
 	rxrpc_propose_ack_respond_to_ack,
 	rxrpc_propose_ack_respond_to_ping,
 	rxrpc_propose_ack_retry_tx,
@@ -811,6 +813,7 @@ int rxrpc_reject_call(struct rxrpc_sock *);
 /*
  * call_event.c
  */
+void __rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
 void rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
 		       enum rxrpc_propose_ack_trace);
diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c
index 0f91d329e910..97a17ada4431 100644
--- a/net/rxrpc/call_event.c
+++ b/net/rxrpc/call_event.c
@@ -24,15 +24,13 @@
 /*
  * Set the timer
  */
-void rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
-		     ktime_t now)
+void __rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
+		       ktime_t now)
 {
 	unsigned long t_j, now_j = jiffies;
 	ktime_t t;
 	bool queue = false;
 
-	read_lock_bh(&call->state_lock);
-
 	if (call->state < RXRPC_CALL_COMPLETE) {
 		t = call->expire_at;
 		if (!ktime_after(t, now)) {
@@ -84,6 +82,16 @@ void rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
 out:
 	if (queue)
 		rxrpc_queue_call(call);
+}
+
+/*
+ * Set the timer
+ */
+void rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
+		     ktime_t now)
+{
+	read_lock_bh(&call->state_lock);
+	__rxrpc_set_timer(call, why, now);
 	read_unlock_bh(&call->state_lock);
 }
 
diff --git a/net/rxrpc/misc.c b/net/rxrpc/misc.c
index 1cdcba52f83b..6dee55fad2d3 100644
--- a/net/rxrpc/misc.c
+++ b/net/rxrpc/misc.c
@@ -195,6 +195,7 @@ const char rxrpc_timer_traces[rxrpc_timer__nr_trace][8] = {
 	[rxrpc_timer_begin]			= "Begin ",
 	[rxrpc_timer_expired]			= "*EXPR*",
 	[rxrpc_timer_init_for_reply]		= "IniRpl",
+	[rxrpc_timer_init_for_send_reply]	= "SndRpl",
 	[rxrpc_timer_set_for_ack]		= "SetAck",
 	[rxrpc_timer_set_for_ping]		= "SetPng",
 	[rxrpc_timer_set_for_send]		= "SetTx ",
@@ -207,6 +208,7 @@ const char rxrpc_propose_ack_traces[rxrpc_propose_ack__nr_trace][8] = {
 	[rxrpc_propose_ack_ping_for_lost_ack]	= "LostAck",
 	[rxrpc_propose_ack_ping_for_lost_reply]	= "LostRpl",
 	[rxrpc_propose_ack_ping_for_params]	= "Params ",
+	[rxrpc_propose_ack_processing_op]	= "ProcOp ",
 	[rxrpc_propose_ack_respond_to_ack]	= "Rsp2Ack",
 	[rxrpc_propose_ack_respond_to_ping]	= "Rsp2Png",
 	[rxrpc_propose_ack_retry_tx]		= "RetryTx",
diff --git a/net/rxrpc/recvmsg.c b/net/rxrpc/recvmsg.c
index db5b02a47518..c29362d50a92 100644
--- a/net/rxrpc/recvmsg.c
+++ b/net/rxrpc/recvmsg.c
@@ -151,17 +151,21 @@ static void rxrpc_end_rx_phase(struct rxrpc_call *call, rxrpc_serial_t serial)
 	switch (call->state) {
 	case RXRPC_CALL_CLIENT_RECV_REPLY:
 		__rxrpc_call_completed(call);
+		write_unlock_bh(&call->state_lock);
 		break;
 
 	case RXRPC_CALL_SERVER_RECV_REQUEST:
 		call->tx_phase = true;
 		call->state = RXRPC_CALL_SERVER_ACK_REQUEST;
+		call->ack_at = call->expire_at;
+		write_unlock_bh(&call->state_lock);
+		rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, 0, serial, false, true,
+				  rxrpc_propose_ack_processing_op);
 		break;
 	default:
+		write_unlock_bh(&call->state_lock);
 		break;
 	}
-
-	write_unlock_bh(&call->state_lock);
 }
 
 /*
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index 55a2fb2cfc2f..b214a4d4a641 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -130,6 +130,11 @@ static void rxrpc_queue_packet(struct rxrpc_call *call, struct sk_buff *skb,
 			break;
 		case RXRPC_CALL_SERVER_ACK_REQUEST:
 			call->state = RXRPC_CALL_SERVER_SEND_REPLY;
+			call->ack_at = call->expire_at;
+			if (call->ackr_reason == RXRPC_ACK_DELAY)
+				call->ackr_reason = 0;
+			__rxrpc_set_timer(call, rxrpc_timer_init_for_send_reply,
+					  ktime_get_real());
 			if (!last)
 				break;
 		case RXRPC_CALL_SERVER_SEND_REPLY: