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skge: fix broken driver

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The patch 136d8f377e broke the skge driver.
Note this part of the patch:
+               if (skge_rx_setup(skge, e, nskb, skge->rx_buf_size) < 0) {
+                       dev_kfree_skb(nskb);
+                       goto resubmit;
+               }
+
                pci_unmap_single(skge->hw->pdev,
                                 dma_unmap_addr(e, mapaddr),
                                 dma_unmap_len(e, maplen),
                                 PCI_DMA_FROMDEVICE);
                skb = e->skb;
                prefetch(skb->data);
-               skge_rx_setup(skge, e, nskb, skge->rx_buf_size);

The function skge_rx_setup modifies e->skb to point to the new skb. Thus,
after this change, the new buffer, not the old, is returned to the
networking stack.

This bug is present in kernels 3.11, 3.11.1 and 3.12-rc1. The patch should
be queued for 3.11-stable.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Reported-by: Vasiliy Glazov <vascom2@gmail.com>
Tested-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mikulas Patocka 2013-09-19 14:13:17 -04:00 committed by David S. Miller
parent 703133de33
commit c194992cbe
1 changed files with 3 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
drivers/net/ethernet/marvell/skge.c
View file

@ -3092,6 +3092,9 @@ static struct sk_buff *skge_rx_get(struct net_device *dev,
if (!nskb)
goto resubmit;
skb = e->skb;
prefetch(skb->data);
if (skge_rx_setup(skge, e, nskb, skge->rx_buf_size) < 0) {
dev_kfree_skb(nskb);
goto resubmit;
@ -3101,8 +3104,6 @@ static struct sk_buff *skge_rx_get(struct net_device *dev,
dma_unmap_addr(e, mapaddr),
dma_unmap_len(e, maplen),
PCI_DMA_FROMDEVICE);
skb = e->skb;
prefetch(skb->data);
}
skb_put(skb, len);