From 33a48ab105a75d37021e422a0a3283241099b142 Mon Sep 17 00:00:00 2001 From: Brian King <brking@linux.vnet.ibm.com> Date: Wed, 7 Sep 2011 14:41:03 +0000 Subject: [PATCH] ibmveth: Fix DMA unmap error Commit 6e8ab30ec677 (ibmveth: Add scatter-gather support) introduced a DMA mapping API inconsistency resulting in dma_unmap_page getting called on memory mapped via dma_map_single. This was seen when CONFIG_DMA_API_DEBUG was enabled. Fix up this API usage inconsistency. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Acked-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> # v2.6.37+ Signed-off-by: David S. Miller <davem@davemloft.net> --- drivers/net/ibmveth.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c index 3e6679269400..dcf65d8f10d2 100644 --- a/drivers/net/ibmveth.c +++ b/drivers/net/ibmveth.c @@ -1026,7 +1026,12 @@ retry_bounce: netdev->stats.tx_bytes += skb->len; } - for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++) + dma_unmap_single(&adapter->vdev->dev, + descs[0].fields.address, + descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, + DMA_TO_DEVICE); + + for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, DMA_TO_DEVICE);