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authorAlexey Dobriyan <adobriyan@gmail.com>2008-05-23 02:00:25 +0400
committerJeff Garzik <jgarzik@redhat.com>2008-05-30 22:07:25 -0400
commitaefdbf1a3b832a580a50cf3d1dcbb717be7cbdbe (patch)
tree8424a76c31a2d03204f58e2b155564ff8fbee953 /drivers/net
parent08722bc4a066705e3f5fb4a5a87ce717fe9f896e (diff)
atl1: fix 4G memory corruption bug
When using 4+ GB RAM and SWIOTLB is active, the driver corrupts memory by writing an skb after the relevant DMA page has been unmapped. Although this doesn't happen when *not* using bounce buffers, clearing the pointer to the DMA page after unmapping it fixes the problem. http://marc.info/?t=120861317000005&r=2&w=2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Jay Cliburn <jacliburn@bellsouth.net> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/atlx/atl1.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c
index 9c2394d49428..79325c4fb544 100644
--- a/drivers/net/atlx/atl1.c
+++ b/drivers/net/atlx/atl1.c
@@ -2023,6 +2023,7 @@ rrd_ok:
/* Good Receive */
pci_unmap_page(adapter->pdev, buffer_info->dma,
buffer_info->length, PCI_DMA_FROMDEVICE);
+ buffer_info->dma = 0;
skb = buffer_info->skb;
length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);