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* [05/18] macb_main: pass struct device to DMA API functions
@ 2019-02-01  8:47 Christoph Hellwig
  0 siblings, 0 replies; 2+ messages in thread
From: Christoph Hellwig @ 2019-02-01  8:47 UTC (permalink / raw)
  To: John Crispin, Vinod Koul, Dmitry Tarnyagin, Nicolas Ferre,
	Sudip Mukherjee, Felipe Balbi, linux-mips, linux-kernel,
	dmaengine, netdev, linux-usb, linux-fbdev, alsa-devel
  Cc: iommu

The DMA API generally relies on a struct device to work properly, and
only barely works without one for legacy reasons.  Pass the easily
available struct device from the platform_device to remedy this.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/net/ethernet/cadence/macb_main.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 2b2882615e8b..61a27963f1d1 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3673,9 +3673,9 @@ static netdev_tx_t at91ether_start_xmit(struct sk_buff *skb,
 		/* Store packet information (to free when Tx completed) */
 		lp->skb = skb;
 		lp->skb_length = skb->len;
-		lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len,
-							DMA_TO_DEVICE);
-		if (dma_mapping_error(NULL, lp->skb_physaddr)) {
+		lp->skb_physaddr = dma_map_single(&lp->pdev->dev, skb->data,
+						  skb->len, DMA_TO_DEVICE);
+		if (dma_mapping_error(&lp->pdev->dev, lp->skb_physaddr)) {
 			dev_kfree_skb_any(skb);
 			dev->stats.tx_dropped++;
 			netdev_err(dev, "%s: DMA mapping error\n", __func__);
@@ -3765,7 +3765,7 @@ static irqreturn_t at91ether_interrupt(int irq, void *dev_id)
 		if (lp->skb) {
 			dev_kfree_skb_irq(lp->skb);
 			lp->skb = NULL;
-			dma_unmap_single(NULL, lp->skb_physaddr,
+			dma_unmap_single(&lp->pdev->dev, lp->skb_physaddr,
 					 lp->skb_length, DMA_TO_DEVICE);
 			dev->stats.tx_packets++;
 			dev->stats.tx_bytes += lp->skb_length;

^ permalink raw reply related	[flat|nested] 2+ messages in thread

* [05/18] macb_main: pass struct device to DMA API functions
@ 2019-02-01 13:34 Nicolas Ferre
  0 siblings, 0 replies; 2+ messages in thread
From: Nicolas Ferre @ 2019-02-01 13:34 UTC (permalink / raw)
  To: hch, john, vkoul, dmitry.tarnyagin, sudipm.mukherjee, balbi,
	linux-mips, linux-kernel, dmaengine, netdev, linux-usb,
	linux-fbdev, alsa-devel
  Cc: iommu

On 01/02/2019 at 09:47, Christoph Hellwig wrote:
> The DMA API generally relies on a struct device to work properly, and
> only barely works without one for legacy reasons.  Pass the easily
> available struct device from the platform_device to remedy this.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>

> ---
>   drivers/net/ethernet/cadence/macb_main.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index 2b2882615e8b..61a27963f1d1 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -3673,9 +3673,9 @@ static netdev_tx_t at91ether_start_xmit(struct sk_buff *skb,
>   		/* Store packet information (to free when Tx completed) */
>   		lp->skb = skb;
>   		lp->skb_length = skb->len;
> -		lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len,
> -							DMA_TO_DEVICE);
> -		if (dma_mapping_error(NULL, lp->skb_physaddr)) {
> +		lp->skb_physaddr = dma_map_single(&lp->pdev->dev, skb->data,
> +						  skb->len, DMA_TO_DEVICE);
> +		if (dma_mapping_error(&lp->pdev->dev, lp->skb_physaddr)) {
>   			dev_kfree_skb_any(skb);
>   			dev->stats.tx_dropped++;
>   			netdev_err(dev, "%s: DMA mapping error\n", __func__);
> @@ -3765,7 +3765,7 @@ static irqreturn_t at91ether_interrupt(int irq, void *dev_id)
>   		if (lp->skb) {
>   			dev_kfree_skb_irq(lp->skb);
>   			lp->skb = NULL;
> -			dma_unmap_single(NULL, lp->skb_physaddr,
> +			dma_unmap_single(&lp->pdev->dev, lp->skb_physaddr,
>   					 lp->skb_length, DMA_TO_DEVICE);
>   			dev->stats.tx_packets++;
>   			dev->stats.tx_bytes += lp->skb_length;
> 


-- 
Nicolas Ferre

^ permalink raw reply	[flat|nested] 2+ messages in thread

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