[PATCH v4 27/33] dmaengine: plx_dma: use channel BH helpers

[Allen Pais <allen.lkml@gmail.com>]

Replace the device tasklet with the per-channel BH helper so completion
callbacks run via dmaengine_*_bh.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/dma/plx_dma.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/plx_dma.c b/drivers/dma/plx_dma.c
index 409898e92c32..00187327e86a 100644
--- a/drivers/dma/plx_dma.c
+++ b/drivers/dma/plx_dma.c
@@ -105,7 +105,6 @@ struct plx_dma_dev {
 	struct dma_chan dma_chan;
 	struct pci_dev __rcu *pdev;
 	void __iomem *bar;
-	struct tasklet_struct desc_task;
 
 	spinlock_t ring_lock;
 	bool ring_active;
@@ -241,9 +240,10 @@ static void plx_dma_stop(struct plx_dma_dev *plxdev)
 	rcu_read_unlock();
 }
 
-static void plx_dma_desc_task(struct tasklet_struct *t)
+static void plx_dma_desc_task(struct dma_chan *chan)
 {
-	struct plx_dma_dev *plxdev = from_tasklet(plxdev, t, desc_task);
+	struct plx_dma_dev *plxdev = container_of(chan, struct plx_dma_dev,
+						  dma_chan);
 
 	plx_dma_process_desc(plxdev);
 }
@@ -366,7 +366,7 @@ static irqreturn_t plx_dma_isr(int irq, void *devid)
 		return IRQ_NONE;
 
 	if (status & PLX_REG_INTR_STATUS_DESC_DONE && plxdev->ring_active)
-		tasklet_schedule(&plxdev->desc_task);
+		dmaengine_schedule_bh(&plxdev->dma_chan);
 
 	writew(status, plxdev->bar + PLX_REG_INTR_STATUS);
 
@@ -471,7 +471,7 @@ static void plx_dma_free_chan_resources(struct dma_chan *chan)
 	if (irq > 0)
 		synchronize_irq(irq);
 
-	tasklet_kill(&plxdev->desc_task);
+	dmaengine_kill_bh(&plxdev->dma_chan);
 
 	plx_dma_abort_desc(plxdev);
 
@@ -505,7 +505,7 @@ static int plx_dma_create(struct pci_dev *pdev)
 		return -ENOMEM;
 
 	spin_lock_init(&plxdev->ring_lock);
-	tasklet_setup(&plxdev->desc_task, plx_dma_desc_task);
+	dmaengine_init_bh(&plxdev->dma_chan, plx_dma_desc_task);
 
 	RCU_INIT_POINTER(plxdev->pdev, pdev);
 	plxdev->bar = pcim_iomap_table(pdev)[0];
-- 
2.43.0