On Tue, 23 Oct 2007 20:49:40 +0530
Kamalesh Babulal <[email protected]> wrote:
> Hi,
>
> Kernel oops is triggered while running fsx-linux test, followed by cpu softlock
> over the AMD box
>
> Unable to handle kernel NULL pointer dereference at 0000000000000018 RIP:
> [<ffffffff8021f2f6>] gart_map_sg+0x26c/0x406
> PGD 10185b067 PUD 10075b067 PMD 0
Does this work?
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index c56e9ee..ae7e016 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -338,7 +338,6 @@ static int __dma_map_cont(struct scatterlist *start, int nelems,
BUG_ON(s != start && s->offset);
if (s == start) {
- *sout = *s;
sout->dma_address = iommu_bus_base;
sout->dma_address += iommu_page*PAGE_SIZE + s->offset;
sout->dma_length = s->length;
@@ -365,7 +364,7 @@ static inline int dma_map_cont(struct scatterlist *start, int nelems,
{
if (!need) {
BUG_ON(nelems != 1);
- *sout = *start;
+ sout->dma_address = start->dma_address;
sout->dma_length = start->length;
return 0;
}
--
1.5.2.4
-
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