The au1000-eth driver contains none of the manual cache synchronization required for using DMA_ATTR_NON_CONSISTENT. From what I can tell it can be used on both dma coherent and non-coherent DMA platforms, but I suspect it has been buggy on the non-coherent platforms all along.
Signed-off-by: Christoph Hellwig hch@lst.de --- drivers/net/ethernet/amd/au1000_eth.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/amd/au1000_eth.c b/drivers/net/ethernet/amd/au1000_eth.c index 75dbd221dc594b..19e195420e2434 100644 --- a/drivers/net/ethernet/amd/au1000_eth.c +++ b/drivers/net/ethernet/amd/au1000_eth.c @@ -1131,10 +1131,9 @@ static int au1000_probe(struct platform_device *pdev) /* Allocate the data buffers * Snooping works fine with eth on all au1xxx */ - aup->vaddr = (u32)dma_alloc_attrs(&pdev->dev, MAX_BUF_SIZE * + aup->vaddr = (u32)dma_alloc_coherent(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), - &aup->dma_addr, 0, - DMA_ATTR_NON_CONSISTENT); + &aup->dma_addr, 0); if (!aup->vaddr) { dev_err(&pdev->dev, "failed to allocate data buffers\n"); err = -ENOMEM; @@ -1310,9 +1309,8 @@ static int au1000_probe(struct platform_device *pdev) err_remap2: iounmap(aup->mac); err_remap1: - dma_free_attrs(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), - (void *)aup->vaddr, aup->dma_addr, - DMA_ATTR_NON_CONSISTENT); + dma_free_coherent(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), + (void *)aup->vaddr, aup->dma_addr); err_vaddr: free_netdev(dev); err_alloc: @@ -1344,9 +1342,8 @@ static int au1000_remove(struct platform_device *pdev) if (aup->tx_db_inuse[i]) au1000_ReleaseDB(aup, aup->tx_db_inuse[i]);
- dma_free_attrs(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), - (void *)aup->vaddr, aup->dma_addr, - DMA_ATTR_NON_CONSISTENT); + dma_free_coherent(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), + (void *)aup->vaddr, aup->dma_addr);
iounmap(aup->macdma); iounmap(aup->mac);