releases/5.10.56/ionic-remove-intr-coalesce-update-from-napi.patch

From ca9cc8937b7ff02d5cabf48df05f9a8f687d0b76 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Fri, 23 Jul 2021 11:02:47 -0700
Subject: ionic: remove intr coalesce update from napi

From: Shannon Nelson <snelson@pensando.io>

[ Upstream commit a6ff85e0a2d9d074a4b4c291ba9ec1e5b0aba22b ]

Move the interrupt coalesce value update out of the napi
thread and into the dim_work thread and set it only when it
has actually changed.

Fixes: 04a834592bf5 ("ionic: dynamic interrupt moderation")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/pensando/ionic/ionic_lif.c  | 14 +++++++++++++-
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c |  4 ----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index d0ae1cf43592..6dc7ce649448 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -52,7 +52,19 @@ static void ionic_dim_work(struct work_struct *work)
 	cur_moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
 	qcq = container_of(dim, struct ionic_qcq, dim);
 	new_coal = ionic_coal_usec_to_hw(qcq->q.lif->ionic, cur_moder.usec);
-	qcq->intr.dim_coal_hw = new_coal ? new_coal : 1;
+	new_coal = new_coal ? new_coal : 1;
+
+	if (qcq->intr.dim_coal_hw != new_coal) {
+		unsigned int qi = qcq->cq.bound_q->index;
+		struct ionic_lif *lif = qcq->q.lif;
+
+		qcq->intr.dim_coal_hw = new_coal;
+
+		ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
+				     lif->rxqcqs[qi]->intr.index,
+				     qcq->intr.dim_coal_hw);
+	}
+
 	dim->state = DIM_START_MEASURE;
 }
 
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index 909eca14f647..ec064327c998 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -429,10 +429,6 @@ static void ionic_dim_update(struct ionic_qcq *qcq)
 	lif = qcq->q.lif;
 	qi = qcq->cq.bound_q->index;
 
-	ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
-			     lif->rxqcqs[qi]->intr.index,
-			     qcq->intr.dim_coal_hw);
-
 	dim_update_sample(qcq->cq.bound_intr->rearm_count,
 			  lif->txqstats[qi].pkts,
 			  lif->txqstats[qi].bytes,
-- 
2.30.2