[PATCH v10 6/8] dmaengine: sh: rz-dmac: Use rz_lmdesc_setup() to invalidate descriptors

[Claudiu Beznea]

From: John Madieu <john.madieu.xa@xxxxxxxxxxxxxx>

rz_lmdesc_setup() invalidates DMA descriptors more comprehensively.
It resets the base, head, and tail pointers of the descriptor list and
clears the descriptor headers and their NXLA pointers. Use
rz_lmdesc_setup() instead of open-coding parts of its logic.

Signed-off-by: John Madieu <john.madieu.xa@xxxxxxxxxxxxxx>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>
---

Changes in v10:
- none, this patch is new and replaces the patch 6/8
  ("dmaengine: sh: rz-dmac: Add rz_dmac_invalidate_lmdesc()") from v9

 drivers/dma/sh/rz-dmac.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c
index eca62d9e9772..6bfa77844e02 100644
--- a/drivers/dma/sh/rz-dmac.c
+++ b/drivers/dma/sh/rz-dmac.c
@@ -460,15 +460,12 @@ static void rz_dmac_free_chan_resources(struct dma_chan *chan)
 {
 	struct rz_dmac_chan *channel = to_rz_dmac_chan(chan);
 	struct rz_dmac *dmac = to_rz_dmac(chan->device);
-	struct rz_lmdesc *lmdesc = channel->lmdesc.base;
 	struct rz_dmac_desc *desc, *_desc;
 	unsigned long flags;
-	unsigned int i;
 
 	spin_lock_irqsave(&channel->vc.lock, flags);
 
-	for (i = 0; i < DMAC_NR_LMDESC; i++)
-		lmdesc[i].header = 0;
+	rz_lmdesc_setup(channel, channel->lmdesc.base);
 
 	rz_dmac_disable_hw(channel);
 	list_splice_tail_init(&channel->ld_active, &channel->ld_free);
@@ -560,15 +557,12 @@ rz_dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
 static int rz_dmac_terminate_all(struct dma_chan *chan)
 {
 	struct rz_dmac_chan *channel = to_rz_dmac_chan(chan);
-	struct rz_lmdesc *lmdesc = channel->lmdesc.base;
 	unsigned long flags;
-	unsigned int i;
 	LIST_HEAD(head);
 
 	spin_lock_irqsave(&channel->vc.lock, flags);
 	rz_dmac_disable_hw(channel);
-	for (i = 0; i < DMAC_NR_LMDESC; i++)
-		lmdesc[i].header = 0;
+	rz_lmdesc_setup(channel, channel->lmdesc.base);
 
 	list_splice_tail_init(&channel->ld_active, &channel->ld_free);
 	list_splice_tail_init(&channel->ld_queue, &channel->ld_free);
-- 
2.43.0