@@ -449,10 +449,6 @@ static int ks8842_tx_frame_dma(struct sk_buff *skb, struct net_device *netdev)
*buf++ = (skb->len >> 8) & 0xff;
skb_copy_from_linear_data(skb, buf, skb->len);
- dma_sync_single_range_for_device(adapter->dev,
- sg_dma_address(&ctl->sg), 0, sg_dma_len(&ctl->sg),
- DMA_TO_DEVICE);
-
/* make sure the length is a multiple of 4 */
if (sg_dma_len(&ctl->sg) % 4)
sg_dma_len(&ctl->sg) += 4 - sg_dma_len(&ctl->sg) % 4;
@@ -908,12 +904,10 @@ static void ks8842_dealloc_dma_bufs(struct ks8842_adapter *adapter)
tasklet_kill(&rx_ctl->tasklet);
- if (sg_dma_address(&tx_ctl->sg))
- dma_unmap_single(adapter->dev, sg_dma_address(&tx_ctl->sg),
- DMA_BUFFER_SIZE, DMA_TO_DEVICE);
+ if (tx_ctl->buf)
+ dma_free_coherent(adapter->dev, DMA_BUFFER_SIZE,
+ tx_ctl->buf, sg_dma_address(&tx_ctl->sg));
sg_dma_address(&tx_ctl->sg) = 0;
-
- kfree(tx_ctl->buf);
tx_ctl->buf = NULL;
}
@@ -945,21 +939,13 @@ static int ks8842_alloc_dma_bufs(struct net_device *netdev)
}
/* allocate DMA buffer */
- tx_ctl->buf = kmalloc(DMA_BUFFER_SIZE, GFP_KERNEL);
+ tx_ctl->buf = dma_alloc_coherent(adapter->dev, DMA_BUFFER_SIZE,
+ &sg_dma_address(&tx_ctl->sg), GFP_KERNEL);
if (!tx_ctl->buf) {
err = -ENOMEM;
goto err;
}
- sg_dma_address(&tx_ctl->sg) = dma_map_single(adapter->dev,
- tx_ctl->buf, DMA_BUFFER_SIZE, DMA_TO_DEVICE);
- err = dma_mapping_error(adapter->dev,
- sg_dma_address(&tx_ctl->sg));
- if (err) {
- sg_dma_address(&tx_ctl->sg) = 0;
- goto err;
- }
-
rx_ctl->chan = dma_request_channel(mask, ks8842_dma_filter_fn,
(void *)(long)rx_ctl->channel);
if (!rx_ctl->chan) {
This patch fixes a cache sync issue found in MeeGo 1.1. It was found that bytes after the first 64 of the TX buffer was not flushed from the cache correctly. The patch switches out kmalloc/dma_map_single/dma_sync_single_for_device to dma_alloc_coherent. Signed-off-by: Richard Röjfors <richard.rojfors@pelagicore.com> --- -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html