netdev - [PATCH v2 net-next 5/8] net: enqueue_to

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Message-ID: <20240329154225.349288-6-edumazet@google.com>
Date: Fri, 29 Mar 2024 15:42:22 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, eric.dumazet@...il.com, 
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH v2 net-next 5/8] net: enqueue_to_backlog() cleanup

We can remove a goto and a label by reversing a condition.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/core/dev.c | 24 +++++++++++-------------
 1 file changed, 11 insertions(+), 13 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 02c98f115243202c409ee00c16e08fb0cf4d9ab9..0a8ccb0451c30a39f8f8b45d26b7e5548b8bfba4 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4816,20 +4816,18 @@ static int enqueue_to_backlog(struct sk_buff *skb, int cpu,
 	backlog_lock_irq_save(sd, &flags);
 	qlen = skb_queue_len(&sd->input_pkt_queue);
 	if (qlen <= max_backlog && !skb_flow_limit(skb, qlen)) {
-		if (qlen) {
-enqueue:
-			__skb_queue_tail(&sd->input_pkt_queue, skb);
-			input_queue_tail_incr_save(sd, qtail);
-			backlog_unlock_irq_restore(sd, &flags);
-			return NET_RX_SUCCESS;
+		if (!qlen) {
+			/* Schedule NAPI for backlog device. We can use
+			 * non atomic operation as we own the queue lock.
+			 */
+			if (!__test_and_set_bit(NAPI_STATE_SCHED,
+						&sd->backlog.state))
+				napi_schedule_rps(sd);
 		}
-
-		/* Schedule NAPI for backlog device
-		 * We can use non atomic operation since we own the queue lock
-		 */
-		if (!__test_and_set_bit(NAPI_STATE_SCHED, &sd->backlog.state))
-			napi_schedule_rps(sd);
-		goto enqueue;
+		__skb_queue_tail(&sd->input_pkt_queue, skb);
+		input_queue_tail_incr_save(sd, qtail);
+		backlog_unlock_irq_restore(sd, &flags);
+		return NET_RX_SUCCESS;
 	}
 
 	backlog_unlock_irq_restore(sd, &flags);
-- 
2.44.0.478.gd926399ef9-goog