dma40: remove duplicated dev addr code

Acked-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/dma/ste_dma40.c

@@ -1909,25 +1909,10 @@ static int d40_prep_slave_sg_log(struct d40_desc *d40d,
 				 struct scatterlist *sgl,
 				 unsigned int sg_len,
 				 enum dma_data_direction direction,
-				 unsigned long dma_flags)
+				 dma_addr_t dev_addr)
 {
-	dma_addr_t dev_addr = 0;
 	int total_size;
 
-	if (direction == DMA_FROM_DEVICE)
-		if (d40c->runtime_addr)
-			dev_addr = d40c->runtime_addr;
-		else
-			dev_addr = d40c->base->plat_data->dev_rx[d40c->dma_cfg.src_dev_type];
-	else if (direction == DMA_TO_DEVICE)
-		if (d40c->runtime_addr)
-			dev_addr = d40c->runtime_addr;
-		else
-			dev_addr = d40c->base->plat_data->dev_tx[d40c->dma_cfg.dst_dev_type];
-
-	else
-		return -EINVAL;
-
 	total_size = d40_log_sg_to_dev(sgl, sg_len,
 				       &d40d->lli_log,
 				       &d40c->log_def,
@@ -1947,27 +1932,12 @@ static int d40_prep_slave_sg_phy(struct d40_desc *d40d,
 				 struct scatterlist *sgl,
 				 unsigned int sgl_len,
 				 enum dma_data_direction direction,
-				 unsigned long dma_flags)
+				 dma_addr_t dev_addr)
 {
-	dma_addr_t src_dev_addr;
-	dma_addr_t dst_dev_addr;
+	dma_addr_t src_dev_addr = direction == DMA_FROM_DEVICE ? dev_addr : 0;
+	dma_addr_t dst_dev_addr = direction == DMA_TO_DEVICE ? dev_addr : 0;
 	int res;
 
-	if (direction == DMA_FROM_DEVICE) {
-		dst_dev_addr = 0;
-		if (d40c->runtime_addr)
-			src_dev_addr = d40c->runtime_addr;
-		else
-			src_dev_addr = d40c->base->plat_data->dev_rx[d40c->dma_cfg.src_dev_type];
-	} else if (direction == DMA_TO_DEVICE) {
-		if (d40c->runtime_addr)
-			dst_dev_addr = d40c->runtime_addr;
-		else
-			dst_dev_addr = d40c->base->plat_data->dev_tx[d40c->dma_cfg.dst_dev_type];
-		src_dev_addr = 0;
-	} else
-		return -EINVAL;
-
 	res = d40_phy_sg_to_lli(sgl,
 				sgl_len,
 				src_dev_addr,
@@ -1997,6 +1967,24 @@ static int d40_prep_slave_sg_phy(struct d40_desc *d40d,
 	return 0;
 }
 
+static dma_addr_t
+d40_get_dev_addr(struct d40_chan *chan, enum dma_data_direction direction)
+{
+	struct stedma40_platform_data *plat = chan->base->plat_data;
+	struct stedma40_chan_cfg *cfg = &chan->dma_cfg;
+	dma_addr_t addr;
+
+	if (chan->runtime_addr)
+		return chan->runtime_addr;
+
+	if (direction == DMA_FROM_DEVICE)
+		addr = plat->dev_rx[cfg->src_dev_type];
+	else if (direction == DMA_TO_DEVICE)
+		addr = plat->dev_tx[cfg->dst_dev_type];
+
+	return addr;
+}
+
 static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
 							 struct scatterlist *sgl,
 							 unsigned int sg_len,
@@ -2006,6 +1994,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
 	struct d40_desc *d40d;
 	struct d40_chan *d40c = container_of(chan, struct d40_chan,
 					     chan);
+	dma_addr_t dev_addr;
 	unsigned long flags;
 	int err;
 
@@ -2014,18 +2003,23 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
 		return ERR_PTR(-EINVAL);
 	}
 
+	if (direction != DMA_FROM_DEVICE && direction != DMA_TO_DEVICE)
+		return NULL;
+
 	spin_lock_irqsave(&d40c->lock, flags);
 
 	d40d = d40_prep_desc(d40c, sgl, sg_len, dma_flags);
 	if (d40d == NULL)
 		goto err;
 
+	dev_addr = d40_get_dev_addr(d40c, direction);
+
 	if (chan_is_logical(d40c))
 		err = d40_prep_slave_sg_log(d40d, d40c, sgl, sg_len,
-					    direction, dma_flags);
+					    direction, dev_addr);
 	else
 		err = d40_prep_slave_sg_phy(d40d, d40c, sgl, sg_len,
-					    direction, dma_flags);
+					    direction, dev_addr);
 	if (err) {
 		chan_err(d40c, "Failed to prepare %s slave sg job: %d\n",
 			chan_is_logical(d40c) ? "log" : "phy", err);