[PATCH v5 02/10] dmaengine: dw-edma: Add xfer_sz field to struct dw_edma_chunk

[Frank . Li]

From: Frank Li <Frank.Li@xxxxxxx>

Reusing ll_region.sz as the transfer size is misleading because
ll_region.sz represents the memory size of the EDMA link list, not the
amount of data to be transferred.

Add a new xfer_sz field to explicitly indicate the total transfer size
of a chunk.

Tested-by: Koichiro Den <den@xxxxxxxxxxxxx>
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
Change in v4
- collect Koichiro tag
---
 drivers/dma/dw-edma/dw-edma-core.c | 4 ++--
 drivers/dma/dw-edma/dw-edma-core.h | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 1fec1b52e3d47..53469c8c8b82e 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -192,7 +192,7 @@ static int dw_edma_start_transfer(struct dw_edma_chan *chan)
 		return 0;
 
 	dw_edma_core_start(dw, child, !desc->xfer_sz);
-	desc->xfer_sz += child->ll_region.sz;
+	desc->xfer_sz += child->xfer_sz;
 	dw_edma_free_burst(child);
 	list_del(&child->list);
 	kfree(child);
@@ -527,7 +527,7 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer,
 		else if (xfer->type == EDMA_XFER_INTERLEAVED)
 			burst->sz = xfer->xfer.il->sgl[i % fsz].size;
 
-		chunk->ll_region.sz += burst->sz;
+		chunk->xfer_sz += burst->sz;
 		desc->alloc_sz += burst->sz;
 
 		if (dir == DMA_DEV_TO_MEM) {
diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h
index 6474cacf71953..db5f45bf048c3 100644
--- a/drivers/dma/dw-edma/dw-edma-core.h
+++ b/drivers/dma/dw-edma/dw-edma-core.h
@@ -57,6 +57,7 @@ struct dw_edma_chunk {
 	u32				bursts_alloc;
 
 	u8				cb;
+	u32				xfer_sz;
 	struct dw_edma_region		ll_region;	/* Linked list */
 };
 

-- 
2.43.0