From 1965da94d854758b4beebfeadcfae480039cbb76 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Thu, 5 Jun 2008 18:44:59 -0500 Subject: [PATCH] atl1: fix 4G memory corruption bug upstream commit: aefdbf1a3b832a580a50cf3d1dcbb717be7cbdbe 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 Signed-off-by: Jay Cliburn Signed-off-by: Jeff Garzik [jacliburn@bellsouth.net: backport to 2.6.25.4] Signed-off-by: Chris Wright --- drivers/net/atl1/atl1_main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/atl1/atl1_main.c b/drivers/net/atl1/atl1_main.c index 129b8b3aa7731..68be4e1c69aed 100644 --- a/drivers/net/atl1/atl1_main.c +++ b/drivers/net/atl1/atl1_main.c @@ -1334,6 +1334,7 @@ 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); -- 2.47.2