[PATCH v4 25/33] dmaengine: mv_xor_v2: use channel BH helpers

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

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

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/dma/mv_xor_v2.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/dma/mv_xor_v2.c b/drivers/dma/mv_xor_v2.c
index 1920dcd5886e..3c8d7b065d3f 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -139,7 +139,6 @@ struct mv_xor_v2_descriptor {
  * @reg_clk: reference to the 'reg' clock
  * @dma_base: memory mapped DMA register base
  * @glob_base: memory mapped global register base
- * @irq_tasklet: tasklet used for IRQ handling call-backs
  * @free_sw_desc: linked list of free SW descriptors
  * @dmadev: dma device
  * @dmachan: dma channel
@@ -158,7 +157,6 @@ struct mv_xor_v2_device {
 	void __iomem *glob_base;
 	struct clk *clk;
 	struct clk *reg_clk;
-	struct tasklet_struct irq_tasklet;
 	struct list_head free_sw_desc;
 	struct dma_device dmadev;
 	struct dma_chan	dmachan;
@@ -290,8 +288,8 @@ static irqreturn_t mv_xor_v2_interrupt_handler(int irq, void *data)
 	if (!ndescs)
 		return IRQ_NONE;
 
-	/* schedule a tasklet to handle descriptors callbacks */
-	tasklet_schedule(&xor_dev->irq_tasklet);
+	/* schedule a bottom half to handle descriptors callbacks */
+	dmaengine_schedule_bh(&xor_dev->dmachan);
 
 	return IRQ_HANDLED;
 }
@@ -346,8 +344,8 @@ mv_xor_v2_prep_sw_desc(struct mv_xor_v2_device *xor_dev)
 
 	if (list_empty(&xor_dev->free_sw_desc)) {
 		spin_unlock_bh(&xor_dev->lock);
-		/* schedule tasklet to free some descriptors */
-		tasklet_schedule(&xor_dev->irq_tasklet);
+		/* schedule bottom half to free some descriptors */
+		dmaengine_schedule_bh(&xor_dev->dmachan);
 		return NULL;
 	}
 
@@ -553,10 +551,10 @@ int mv_xor_v2_get_pending_params(struct mv_xor_v2_device *xor_dev,
 /*
  * handle the descriptors after HW process
  */
-static void mv_xor_v2_tasklet(struct tasklet_struct *t)
+static void mv_xor_v2_tasklet(struct dma_chan *chan)
 {
-	struct mv_xor_v2_device *xor_dev = from_tasklet(xor_dev, t,
-							irq_tasklet);
+	struct mv_xor_v2_device *xor_dev =
+		container_of(chan, struct mv_xor_v2_device, dmachan);
 	int pending_ptr, num_of_pending, i;
 	struct mv_xor_v2_sw_desc *next_pending_sw_desc = NULL;
 
@@ -760,7 +758,7 @@ static int mv_xor_v2_probe(struct platform_device *pdev)
 	if (ret)
 		goto free_msi_irqs;
 
-	tasklet_setup(&xor_dev->irq_tasklet, mv_xor_v2_tasklet);
+	dmaengine_init_bh(&xor_dev->dmachan, mv_xor_v2_tasklet);
 
 	xor_dev->desc_size = mv_xor_v2_set_desc_size(xor_dev);
 
@@ -868,7 +866,7 @@ static void mv_xor_v2_remove(struct platform_device *pdev)
 
 	platform_device_msi_free_irqs_all(&pdev->dev);
 
-	tasklet_kill(&xor_dev->irq_tasklet);
+	dmaengine_kill_bh(&xor_dev->dmachan);
 }
 
 #ifdef CONFIG_OF
-- 
2.43.0