netdev - [net-next v3 07/20] net: sundance: convert tasklets to use new tasklet

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Date:   Mon, 14 Sep 2020 12:59:26 +0530
From:   Allen Pais <allen.lkml@...il.com>
To:     davem@...emloft.net
Cc:     jes@...ined-monkey.org, kuba@...nel.org, dougmill@...ux.ibm.com,
        cooldavid@...ldavid.org, mlindner@...vell.com,
        stephen@...workplumber.org, borisp@...lanox.com,
        netdev@...r.kernel.org, Allen Pais <apais@...ux.microsoft.com>,
        Romain Perier <romain.perier@...il.com>
Subject: [net-next v3 07/20] net: sundance: convert tasklets to use new tasklet_setup() API

From: Allen Pais <apais@...ux.microsoft.com>

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@...il.com>
Signed-off-by: Allen Pais <apais@...ux.microsoft.com>
---
 drivers/net/ethernet/dlink/sundance.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/dlink/sundance.c b/drivers/net/ethernet/dlink/sundance.c
index b3f8597e77aa..e3a8858915b3 100644
--- a/drivers/net/ethernet/dlink/sundance.c
+++ b/drivers/net/ethernet/dlink/sundance.c
@@ -367,6 +367,7 @@ struct netdev_private {
         dma_addr_t tx_ring_dma;
         dma_addr_t rx_ring_dma;
 	struct timer_list timer;		/* Media monitoring timer. */
+	struct net_device *ndev;		/* backpointer */
 	/* ethtool extra stats */
 	struct {
 		u64 tx_multiple_collisions;
@@ -429,8 +430,8 @@ static void init_ring(struct net_device *dev);
 static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev);
 static int reset_tx (struct net_device *dev);
 static irqreturn_t intr_handler(int irq, void *dev_instance);
-static void rx_poll(unsigned long data);
-static void tx_poll(unsigned long data);
+static void rx_poll(struct tasklet_struct *t);
+static void tx_poll(struct tasklet_struct *t);
 static void refill_rx (struct net_device *dev);
 static void netdev_error(struct net_device *dev, int intr_status);
 static void netdev_error(struct net_device *dev, int intr_status);
@@ -531,14 +532,15 @@ static int sundance_probe1(struct pci_dev *pdev,
 			cpu_to_le16(eeprom_read(ioaddr, i + EEPROM_SA_OFFSET));
 
 	np = netdev_priv(dev);
+	np->ndev = dev;
 	np->base = ioaddr;
 	np->pci_dev = pdev;
 	np->chip_id = chip_idx;
 	np->msg_enable = (1 << debug) - 1;
 	spin_lock_init(&np->lock);
 	spin_lock_init(&np->statlock);
-	tasklet_init(&np->rx_tasklet, rx_poll, (unsigned long)dev);
-	tasklet_init(&np->tx_tasklet, tx_poll, (unsigned long)dev);
+	tasklet_setup(&np->rx_tasklet, rx_poll);
+	tasklet_setup(&np->tx_tasklet, tx_poll);
 
 	ring_space = dma_alloc_coherent(&pdev->dev, TX_TOTAL_SIZE,
 			&ring_dma, GFP_KERNEL);
@@ -1054,10 +1056,9 @@ static void init_ring(struct net_device *dev)
 	}
 }
 
-static void tx_poll (unsigned long data)
+static void tx_poll(struct tasklet_struct *t)
 {
-	struct net_device *dev = (struct net_device *)data;
-	struct netdev_private *np = netdev_priv(dev);
+	struct netdev_private *np = from_tasklet(np, t, tx_tasklet);
 	unsigned head = np->cur_task % TX_RING_SIZE;
 	struct netdev_desc *txdesc =
 		&np->tx_ring[(np->cur_tx - 1) % TX_RING_SIZE];
@@ -1312,10 +1313,10 @@ static irqreturn_t intr_handler(int irq, void *dev_instance)
 	return IRQ_RETVAL(handled);
 }
 
-static void rx_poll(unsigned long data)
+static void rx_poll(struct tasklet_struct *t)
 {
-	struct net_device *dev = (struct net_device *)data;
-	struct netdev_private *np = netdev_priv(dev);
+	struct netdev_private *np = from_tasklet(np, t, rx_tasklet);
+	struct net_device *dev = np->ndev;
 	int entry = np->cur_rx % RX_RING_SIZE;
 	int boguscnt = np->budget;
 	void __iomem *ioaddr = np->base;
-- 
2.25.1