netdev - [PATCH 11/15] net: ehea: Convert tasklet API to new bottom half workqueue mechanism

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Date: Thu, 20 Jun 2024 22:05:21 -0700
From: Allen Pais <allen.lkml@...il.com>
To: kuba@...nel.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.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,
	nbd@....name,
	sean.wang@...iatek.com,
	Mark-MC.Lee@...iatek.com,
	lorenzo@...nel.org,
	matthias.bgg@...il.com,
	angelogioacchino.delregno@...labora.com,
	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
Subject: [PATCH 11/15] net: ehea: 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 ehea driver. This transition ensures compatibility
with the latest design and enhances performance.

Signed-off-by: Allen Pais <allen.lkml@...il.com>
---
 drivers/net/ethernet/ibm/ehea/ehea.h      |  3 ++-
 drivers/net/ethernet/ibm/ehea/ehea_main.c | 14 +++++++-------
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea.h b/drivers/net/ethernet/ibm/ehea/ehea.h
index 208c440a602b..c1e7e22884fa 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea.h
@@ -19,6 +19,7 @@
 #include <linux/ethtool.h>
 #include <linux/vmalloc.h>
 #include <linux/if_vlan.h>
+#include <linux/workqueue.h>
 #include <linux/platform_device.h>
 
 #include <asm/ibmebus.h>
@@ -381,7 +382,7 @@ struct ehea_adapter {
 	struct platform_device *ofdev;
 	struct ehea_port *port[EHEA_MAX_PORTS];
 	struct ehea_eq *neq;       /* notification event queue */
-	struct tasklet_struct neq_tasklet;
+	struct work_struct neq_bh_work;
 	struct ehea_mr mr;
 	u32 pd;                    /* protection domain */
 	u64 max_mc_mac;            /* max number of multicast mac addresses */
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 1e29e5c9a2df..6960d06805f6 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -976,7 +976,7 @@ int ehea_sense_port_attr(struct ehea_port *port)
 	u64 hret;
 	struct hcp_ehea_port_cb0 *cb0;
 
-	/* may be called via ehea_neq_tasklet() */
+	/* may be called via ehea_neq_bh_work() */
 	cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 	if (!cb0) {
 		pr_err("no mem for cb0\n");
@@ -1216,9 +1216,9 @@ static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
 	}
 }
 
-static void ehea_neq_tasklet(struct tasklet_struct *t)
+static void ehea_neq_bh_work(struct work_struct *work)
 {
-	struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet);
+	struct ehea_adapter *adapter = from_work(adapter, work, neq_bh_work);
 	struct ehea_eqe *eqe;
 	u64 event_mask;
 
@@ -1243,7 +1243,7 @@ static void ehea_neq_tasklet(struct tasklet_struct *t)
 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
 {
 	struct ehea_adapter *adapter = param;
-	tasklet_hi_schedule(&adapter->neq_tasklet);
+	queue_work(system_bh_highpri_wq, &adapter->neq_bh_work);
 	return IRQ_HANDLED;
 }
 
@@ -3423,7 +3423,7 @@ static int ehea_probe_adapter(struct platform_device *dev)
 		goto out_free_ad;
 	}
 
-	tasklet_setup(&adapter->neq_tasklet, ehea_neq_tasklet);
+	INIT_WORK(&adapter->neq_bh_work, ehea_neq_bh_work);
 
 	ret = ehea_create_device_sysfs(dev);
 	if (ret)
@@ -3444,7 +3444,7 @@ static int ehea_probe_adapter(struct platform_device *dev)
 	}
 
 	/* Handle any events that might be pending. */
-	tasklet_hi_schedule(&adapter->neq_tasklet);
+	queue_work(system_bh_highpri_wq, &adapter->neq_bh_work);
 
 	ret = 0;
 	goto out;
@@ -3485,7 +3485,7 @@ static void ehea_remove(struct platform_device *dev)
 	ehea_remove_device_sysfs(dev);
 
 	ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
-	tasklet_kill(&adapter->neq_tasklet);
+	cancel_work_sync(&adapter->neq_bh_work);
 
 	ehea_destroy_eq(adapter->neq);
 	ehea_remove_adapter_mr(adapter);
-- 
2.34.1