b43legacy: convert tasklets to use new tasklet_setup() API

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@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200817090637.26887-7-allen.cryptic@gmail.com

drivers/net/wireless/broadcom/b43legacy/main.c

@@ -1275,9 +1275,9 @@ static void handle_irq_ucode_debug(struct b43legacy_wldev *dev)
 }
 
 /* Interrupt handler bottom-half */
-static void b43legacy_interrupt_tasklet(unsigned long data)
+static void b43legacy_interrupt_tasklet(struct tasklet_struct *t)
 {
-	struct b43legacy_wldev *dev = (struct b43legacy_wldev *)data;
+	struct b43legacy_wldev *dev = from_tasklet(dev, t, isr_tasklet);
 	u32 reason;
 	u32 dma_reason[ARRAY_SIZE(dev->dma_reason)];
 	u32 merged_dma_reason = 0;
@@ -3742,9 +3742,7 @@ static int b43legacy_one_core_attach(struct ssb_device *dev,
 	wldev->wl = wl;
 	b43legacy_set_status(wldev, B43legacy_STAT_UNINIT);
 	wldev->bad_frames_preempt = modparam_bad_frames_preempt;
-	tasklet_init(&wldev->isr_tasklet,
-		     b43legacy_interrupt_tasklet,
-		     (unsigned long)wldev);
+	tasklet_setup(&wldev->isr_tasklet, b43legacy_interrupt_tasklet);
 	if (modparam_pio)
 		wldev->__using_pio = true;
 	INIT_LIST_HEAD(&wldev->list);

drivers/net/wireless/broadcom/b43legacy/pio.c

@@ -264,9 +264,9 @@ static int pio_tx_packet(struct b43legacy_pio_txpacket *packet)
 	return 0;
 }
 
-static void tx_tasklet(unsigned long d)
+static void tx_tasklet(struct tasklet_struct *t)
 {
-	struct b43legacy_pioqueue *queue = (struct b43legacy_pioqueue *)d;
+	struct b43legacy_pioqueue *queue = from_tasklet(queue, t, txtask);
 	struct b43legacy_wldev *dev = queue->dev;
 	unsigned long flags;
 	struct b43legacy_pio_txpacket *packet, *tmp_packet;
@@ -331,8 +331,7 @@ struct b43legacy_pioqueue *b43legacy_setup_pioqueue(struct b43legacy_wldev *dev,
 	INIT_LIST_HEAD(&queue->txfree);
 	INIT_LIST_HEAD(&queue->txqueue);
 	INIT_LIST_HEAD(&queue->txrunning);
-	tasklet_init(&queue->txtask, tx_tasklet,
-		     (unsigned long)queue);
+	tasklet_setup(&queue->txtask, tx_tasklet);
 
 	value = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
 	value &= ~B43legacy_MACCTL_BE;