ixgb: move time stamp set before setting dma pointer
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>
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index 0e72dad..4bf6bbc 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -1290,12 +1290,12 @@
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 @@
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;