netdev - [PATCH v2 net-next 6/8] ionic: check for queue deadline in doorbell_napi

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Date: Tue, 18 Jun 2024 17:32:55 -0700
From: Shannon Nelson <shannon.nelson@....com>
To: <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org>,
	<edumazet@...gle.com>, <pabeni@...hat.com>, <David.Laight@...LAB.COM>,
	<andrew@...n.ch>
CC: <brett.creeley@....com>, <drivers@...sando.io>, Shannon Nelson
	<shannon.nelson@....com>
Subject: [PATCH v2 net-next 6/8] ionic: check for queue deadline in doorbell_napi_work

Check the deadline against the last time run and only
schedule a new napi if we haven't been run recently.

Signed-off-by: Shannon Nelson <shannon.nelson@....com>
---
 drivers/net/ethernet/pensando/ionic/ionic_dev.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 56e7c120d492..ec36ace6d010 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -58,7 +58,14 @@ void ionic_doorbell_napi_work(struct work_struct *work)
 {
 	struct ionic_qcq *qcq = container_of(work, struct ionic_qcq,
 					     doorbell_napi_work);
-	ionic_napi_schedule_do_softirq(&qcq->napi);
+	unsigned long now, then, dif;
+
+	now = READ_ONCE(jiffies);
+	then = qcq->q.dbell_jiffies;
+	dif = now - then;
+
+	if (dif > qcq->q.dbell_deadline)
+		ionic_napi_schedule_do_softirq(&qcq->napi);
 }
 
 static int ionic_get_preferred_cpu(struct ionic *ionic,
-- 
2.17.1