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Message-Id: <20110928220139.049624112@clark.kroah.org>
Date: Wed, 28 Sep 2011 15:01:34 -0700
From: Greg KH <gregkh@...e.de>
To: linux-kernel@...r.kernel.org, stable@...nel.org
Cc: stable-review@...nel.org, torvalds@...ux-foundation.org,
akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
Brian King <brking@...ux.vnet.ibm.com>,
Anton Blanchard <anton@...ba.org>,
"David S. Miller" <davem@...emloft.net>
Subject: [130/244] ibmveth: Fix DMA unmap error
3.0-stable review patch. If anyone has any objections, please let us know.
------------------
From: Brian King <brking@...ux.vnet.ibm.com>
commit 33a48ab105a75d37021e422a0a3283241099b142 upstream.
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@...ux.vnet.ibm.com>
Acked-by: Anton Blanchard <anton@...ba.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
drivers/net/ibmveth.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/drivers/net/ibmveth.c
+++ b/drivers/net/ibmveth.c
@@ -1025,7 +1025,12 @@ 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);
--
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