Thread (3 messages) 3 messages, 2 authors, 2009-03-31

Re: [PATCH] net/fec_mpc52xx: fix BUG on missing dma_ops

From: Becky Bruce <hidden>
Date: 2009-03-31 18:59:06
Also in: netdev

On Mar 30, 2009, at 9:25 PM, Grant Likely wrote:
From: Grant Likely <redacted>

The driver triggers a BUG_ON() when allocating DMA buffers if the
arch/powerpc dma_ops from the of_platform device are not copied
into net_device structure.

Signed-off-by: Grant Likely <redacted>
---

Becky, does this look better to you?
Reviewed-by: Becky Bruce <redacted>

I think this is OK now, and Kumar agrees....

Thanks!
B
quoted hunk ↗ jump to hunk

g.

drivers/net/fec_mpc52xx.c |   19 ++++++++++++-------
1 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/net/fec_mpc52xx.c b/drivers/net/fec_mpc52xx.c
index 049b0a7..f99463f 100644
--- a/drivers/net/fec_mpc52xx.c
+++ b/drivers/net/fec_mpc52xx.c
@@ -129,7 +129,8 @@ static void mpc52xx_fec_free_rx_buffers(struct  
net_device *dev, struct bcom_task
		struct sk_buff *skb;

		skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
-		dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE);
+		dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
+				 DMA_FROM_DEVICE);
		kfree_skb(skb);
	}
}
@@ -150,7 +151,7 @@ static int mpc52xx_fec_alloc_rx_buffers(struct  
net_device *dev, struct bcom_task
		bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk);

		bd->status = FEC_RX_BUFFER_SIZE;
-		bd->skb_pa = dma_map_single(&dev->dev, skb->data,
+		bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
				FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);

		bcom_submit_next_buffer(rxtsk, skb);
@@ -388,7 +389,8 @@ static int mpc52xx_fec_hard_start_xmit(struct  
sk_buff *skb, struct net_device *d
		bcom_prepare_next_buffer(priv->tx_dmatsk);

	bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
-	bd->skb_pa = dma_map_single(&dev->dev, skb->data, skb->len,  
DMA_TO_DEVICE);
+	bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
+				    DMA_TO_DEVICE);

	bcom_submit_next_buffer(priv->tx_dmatsk, skb);
@@ -430,7 +432,8 @@ static irqreturn_t mpc52xx_fec_tx_interrupt(int  
irq, void *dev_id)
		struct bcom_fec_bd *bd;
		skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
				(struct bcom_bd **)&bd);
-		dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_TO_DEVICE);
+		dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
+				 DMA_TO_DEVICE);

		dev_kfree_skb_irq(skb);
	}
@@ -455,7 +458,8 @@ static irqreturn_t mpc52xx_fec_rx_interrupt(int  
irq, void *dev_id)

		rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
				(struct bcom_bd **)&bd);
-		dma_unmap_single(&dev->dev, bd->skb_pa, rskb->len,  
DMA_FROM_DEVICE);
+		dma_unmap_single(dev->dev.parent, bd->skb_pa, rskb->len,
+				 DMA_FROM_DEVICE);

		/* Test for errors in received frame */
		if (status & BCOM_FEC_RX_BD_ERRORS) {
@@ -464,7 +468,8 @@ static irqreturn_t mpc52xx_fec_rx_interrupt(int  
irq, void *dev_id)
				bcom_prepare_next_buffer(priv->rx_dmatsk);

			bd->status = FEC_RX_BUFFER_SIZE;
-			bd->skb_pa = dma_map_single(&dev->dev, rskb->data,
+			bd->skb_pa = dma_map_single(dev->dev.parent,
+					rskb->data,
					FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);

			bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
@@ -499,7 +504,7 @@ static irqreturn_t mpc52xx_fec_rx_interrupt(int  
irq, void *dev_id)
			bcom_prepare_next_buffer(priv->rx_dmatsk);

		bd->status = FEC_RX_BUFFER_SIZE;
-		bd->skb_pa = dma_map_single(&dev->dev, skb->data,
+		bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
				FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);

		bcom_submit_next_buffer(priv->rx_dmatsk, skb);
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