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

[Grant Likely]

Thanks Becky.

g.

2009/3/31 Becky Bruce <beckyb at kernel.crashing.org>:
>
> On Mar 30, 2009, at 9:25 PM, Grant Likely wrote:
>
>> From: Grant Likely <grant.likely at secretlab.ca>
>>
>> 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 <grant.likely at secretlab.ca>
>> ---
>>
>> Becky, does this look better to you?
>
> Reviewed-by: Becky Bruce <beckyb at kernel.crashing.org>
>
> I think this is OK now, and Kumar agrees....
>
> Thanks!
> B
>
>>
>>
>> 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);
>
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.