[PATCH v2 31/64] dmaengine: pl330: route callbacks via channel BH

[Allen Pais]

Convert the per-channel tasklet to dma_chan_*_bh while keeping the
controller tasklet for non-callback events.

Signed-off-by: Allen Pais <allen.lkml@xxxxxxxxx>
---
 drivers/dma/pl330.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 25ba84b18704..f4940bd1ab84 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -417,9 +417,6 @@ enum desc_status {
 };
 
 struct dma_pl330_chan {
-	/* Schedule desc completion */
-	struct tasklet_struct task;
-
 	/* DMA-Engine Channel */
 	struct dma_chan chan;
 
@@ -1574,7 +1571,7 @@ static void dma_pl330_rqcb(struct dma_pl330_desc *desc, enum pl330_op_err err)
 
 	spin_unlock_irqrestore(&pch->lock, flags);
 
-	tasklet_schedule(&pch->task);
+	dma_chan_schedule_bh(&pch->chan);
 }
 
 static void pl330_dotask(struct tasklet_struct *t)
@@ -2060,14 +2057,15 @@ static inline void fill_queue(struct dma_pl330_chan *pch)
 			desc->status = DONE;
 			dev_err(pch->dmac->ddma.dev, "%s:%d Bad Desc(%d)\n",
 					__func__, __LINE__, desc->txd.cookie);
-			tasklet_schedule(&pch->task);
+			dma_chan_schedule_bh(&pch->chan);
 		}
 	}
 }
 
-static void pl330_tasklet(struct tasklet_struct *t)
+static void pl330_tasklet(struct dma_chan *chan)
 {
-	struct dma_pl330_chan *pch = from_tasklet(pch, t, task);
+	struct dma_pl330_chan *pch = container_of(chan, struct dma_pl330_chan,
+						  chan);
 	struct dma_pl330_desc *desc, *_dt;
 	unsigned long flags;
 	bool power_down = false;
@@ -2173,7 +2171,7 @@ static int pl330_alloc_chan_resources(struct dma_chan *chan)
 		return -ENOMEM;
 	}
 
-	tasklet_setup(&pch->task, pl330_tasklet);
+	dma_chan_init_bh(&pch->chan, pl330_tasklet);
 
 	spin_unlock_irqrestore(&pl330->lock, flags);
 
@@ -2354,7 +2352,7 @@ static void pl330_free_chan_resources(struct dma_chan *chan)
 	struct pl330_dmac *pl330 = pch->dmac;
 	unsigned long flags;
 
-	tasklet_kill(&pch->task);
+	dma_chan_kill_bh(&pch->chan);
 
 	pm_runtime_get_sync(pch->dmac->ddma.dev);
 	spin_lock_irqsave(&pl330->lock, flags);
@@ -2490,7 +2488,7 @@ static void pl330_issue_pending(struct dma_chan *chan)
 	list_splice_tail_init(&pch->submitted_list, &pch->work_list);
 	spin_unlock_irqrestore(&pch->lock, flags);
 
-	pl330_tasklet(&pch->task);
+	pl330_tasklet(&pch->chan);
 }
 
 /*
-- 
2.43.0