The DMA api requires that the full mapping be sync'd when
copying frame. First found by Jarek on sky2.
Signed-off-by: Stephen Hemminger <shemmin...@vyatta.com>
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c 2010-01-20 12:02:29.269388203
-0800
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c 2010-01-20 12:24:37.828137536
-0800
@@ -624,11 +624,15 @@ void ipoib_cm_handle_rx_wc(struct net_de
small_skb = dev_alloc_skb(dlen + 12);
if (small_skb) {
skb_reserve(small_skb, 12);
- ib_dma_sync_single_for_cpu(priv->ca,
rx_ring[wr_id].mapping[0],
- dlen, DMA_FROM_DEVICE);
+ ib_dma_sync_single_for_cpu(priv->ca,
+ rx_ring[wr_id].mapping[0],
+ IPOIB_CM_HEAD_SIZE,
+ DMA_FROM_DEVICE);
skb_copy_from_linear_data(skb, small_skb->data, dlen);
- ib_dma_sync_single_for_device(priv->ca,
rx_ring[wr_id].mapping[0],
- dlen, DMA_FROM_DEVICE);
+ ib_dma_sync_single_for_device(priv->ca,
+ rx_ring[wr_id].mapping[0],
+ IPOIB_CM_HEAD_SIZE,
+ DMA_FROM_DEVICE);
skb_put(small_skb, dlen);
skb = small_skb;
goto copied;
--
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