diff options
| author | Brandeburg, Jesse <jesse.brandeburg@intel.com> | 2008-09-30 17:08:48 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-10-09 03:53:40 +0400 |
| commit | 23e55a32ca1ffdbe7a492ef99f0e0ac48e504a13 (patch) | |
| tree | 485f848f2270a5d0d1b167e3b5f9d34617979711 | |
| parent | 1694f25b4beb80b911fb21efcff36acca39aa696 (diff) | |
| download | linux-23e55a32ca1ffdbe7a492ef99f0e0ac48e504a13.tar.xz | |
ixgb: fix bug when freeing resources
It was pointed out by Breno Leitao <leitao@linux.vnet.ibm.com> that
ixgb would crash on PPC when an IOMMU was in use, if change_mtu was
called.
It appears to be a pretty simple issue in the driver that wasn't discovered
because most systems don't run with an IOMMU. The driver needs to only unmap
buffers that are mapped (duh).
CC: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ixgb/ixgb_main.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c index aa75385cd6c7..be3c7dc96f63 100644 --- a/drivers/net/ixgb/ixgb_main.c +++ b/drivers/net/ixgb/ixgb_main.c @@ -977,15 +977,17 @@ ixgb_clean_rx_ring(struct ixgb_adapter *adapter) for (i = 0; i < rx_ring->count; i++) { buffer_info = &rx_ring->buffer_info[i]; - if (buffer_info->skb) { - + if (buffer_info->dma) { pci_unmap_single(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_FROMDEVICE); + buffer_info->dma = 0; + buffer_info->length = 0; + } + if (buffer_info->skb) { dev_kfree_skb(buffer_info->skb); - buffer_info->skb = NULL; } } |