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ixgb: move time stamp set before setting dma pointer

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a user pointed out that setting variables out of order with respect
to the checks we make for tx timeout handling could result in a race
where ->dma was set but ->time_stamp was set to the old value.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jesse Brandeburg 2008-07-08 15:51:37 -07:00 committed by Jeff Garzik
parent a65a604a01
commit 3433663546
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ixgb/ixgb_main.c
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@ -1290,12 +1290,12 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
buffer_info->length = size;
WARN_ON(buffer_info->dma != 0);
buffer_info->time_stamp = jiffies;
buffer_info->dma =
pci_map_single(adapter->pdev,
skb->data + offset,
size,
PCI_DMA_TODEVICE);
buffer_info->time_stamp = jiffies;
buffer_info->next_to_watch = 0;
len -= size;
@ -1322,13 +1322,13 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
size -= 4;
buffer_info->length = size;
buffer_info->time_stamp = jiffies;
buffer_info->dma =
pci_map_page(adapter->pdev,
frag->page,
frag->page_offset + offset,
size,
PCI_DMA_TODEVICE);
buffer_info->time_stamp = jiffies;
buffer_info->next_to_watch = 0;
len -= size;