netdev - [PATCH 15/15] net: mtk-wed: Convert tasklet API to new bottom half workqueue mechanism

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Date: Thu, 20 Jun 2024 22:05:25 -0700
From: Allen Pais <allen.lkml@...il.com>
To: kuba@...nel.org,
	Felix Fietkau <nbd@....name>,
	Sean Wang <sean.wang@...iatek.com>,
	Mark Lee <Mark-MC.Lee@...iatek.com>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: jes@...ined-monkey.org,
	kda@...ux-powerpc.org,
	cai.huoqing@...ux.dev,
	dougmill@...ux.ibm.com,
	npiggin@...il.com,
	christophe.leroy@...roup.eu,
	aneesh.kumar@...nel.org,
	naveen.n.rao@...ux.ibm.com,
	nnac123@...ux.ibm.com,
	tlfalcon@...ux.ibm.com,
	cooldavid@...ldavid.org,
	marcin.s.wojtas@...il.com,
	mlindner@...vell.com,
	stephen@...workplumber.org,
	borisp@...dia.com,
	bryan.whitehead@...rochip.com,
	UNGLinuxDriver@...rochip.com,
	louis.peens@...igine.com,
	richardcochran@...il.com,
	linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-acenic@...site.dk,
	linux-net-drivers@....com,
	Allen Pais <allen.lkml@...il.com>,
	netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH 15/15] net: mtk-wed: Convert tasklet API to new bottom half workqueue mechanism

Migrate tasklet APIs to the new bottom half workqueue mechanism. It
replaces all occurrences of tasklet usage with the appropriate workqueue
APIs throughout the mtk-wed driver. This transition ensures compatibility
with the latest design and enhances performance.

Signed-off-by: Allen Pais <allen.lkml@...il.com>
---
 drivers/net/ethernet/mediatek/mtk_wed_wo.c | 12 ++++++------
 drivers/net/ethernet/mediatek/mtk_wed_wo.h |  3 ++-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_wed_wo.c b/drivers/net/ethernet/mediatek/mtk_wed_wo.c
index 7063c78bd35f..acca9ec67fcf 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed_wo.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.c
@@ -71,7 +71,7 @@ static void
 mtk_wed_wo_irq_enable(struct mtk_wed_wo *wo, u32 mask)
 {
 	mtk_wed_wo_set_isr_mask(wo, 0, mask, false);
-	tasklet_schedule(&wo->mmio.irq_tasklet);
+	queue_work(system_bh_wq, &wo->mmio.irq_bh_work);
 }
 
 static void
@@ -227,14 +227,14 @@ mtk_wed_wo_irq_handler(int irq, void *data)
 	struct mtk_wed_wo *wo = data;
 
 	mtk_wed_wo_set_isr(wo, 0);
-	tasklet_schedule(&wo->mmio.irq_tasklet);
+	queue_work(system_bh_wq, &wo->mmio.irq_bh_work);
 
 	return IRQ_HANDLED;
 }
 
-static void mtk_wed_wo_irq_tasklet(struct tasklet_struct *t)
+static void mtk_wed_wo_irq_bh_work(struct work_struct *work)
 {
-	struct mtk_wed_wo *wo = from_tasklet(wo, t, mmio.irq_tasklet);
+	struct mtk_wed_wo *wo = from_work(wo, work, mmio.irq_bh_work);
 	u32 intr, mask;
 
 	/* disable interrupts */
@@ -395,7 +395,7 @@ mtk_wed_wo_hardware_init(struct mtk_wed_wo *wo)
 	wo->mmio.irq = irq_of_parse_and_map(np, 0);
 	wo->mmio.irq_mask = MTK_WED_WO_ALL_INT_MASK;
 	spin_lock_init(&wo->mmio.lock);
-	tasklet_setup(&wo->mmio.irq_tasklet, mtk_wed_wo_irq_tasklet);
+	INIT_WORK(&wo->mmio.irq_bh_work, mtk_wed_wo_irq_bh_work);
 
 	ret = devm_request_irq(wo->hw->dev, wo->mmio.irq,
 			       mtk_wed_wo_irq_handler, IRQF_TRIGGER_HIGH,
@@ -449,7 +449,7 @@ mtk_wed_wo_hw_deinit(struct mtk_wed_wo *wo)
 	/* disable interrupts */
 	mtk_wed_wo_set_isr(wo, 0);
 
-	tasklet_disable(&wo->mmio.irq_tasklet);
+	disable_work_sync(&wo->mmio.irq_bh_work);
 
 	disable_irq(wo->mmio.irq);
 	devm_free_irq(wo->hw->dev, wo->mmio.irq, wo);
diff --git a/drivers/net/ethernet/mediatek/mtk_wed_wo.h b/drivers/net/ethernet/mediatek/mtk_wed_wo.h
index 87a67fa3868d..50d619fa213a 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed_wo.h
+++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.h
@@ -6,6 +6,7 @@
 
 #include <linux/skbuff.h>
 #include <linux/netdevice.h>
+#include <linux/workqueue.h>
 
 struct mtk_wed_hw;
 
@@ -247,7 +248,7 @@ struct mtk_wed_wo {
 		struct regmap *regs;
 
 		spinlock_t lock;
-		struct tasklet_struct irq_tasklet;
+		struct work_struct irq_bh_work;
 		int irq;
 		u32 irq_mask;
 	} mmio;
-- 
2.34.1