It seems like this problem is (yet again) caused by lack of cache flushing.
The attached patch adds a dma_cache_wback_inv to pci_map_sg in pci.h
to the if fork in which sg->address is not set.
This fixes my problem.
Can someone with commit access please apply this patch?
/Brian
Index: include/asm-mips/pci.h
===================================================================
RCS file: /cvs/linux-mips/include/asm-mips/pci.h,v
retrieving revision 1.1.1.2
diff -u -r1.1.1.2 pci.h
--- include/asm-mips/pci.h 19 Aug 2002 18:00:29 -0000 1.1.1.2
+++ include/asm-mips/pci.h 12 Sep 2002 20:06:31 -0000
@@ -200,9 +200,13 @@
dma_cache_wback_inv((unsigned long)sg->address,
sg->length);
sg->dma_address = bus_to_baddr(hwdev, __pa(sg->address));
- } else
+ } else {
sg->dma_address = page_to_bus(sg->page) +
sg->offset;
+ dma_cache_wback_inv(
+ (unsigned long)(page_address(sg->page)+
+ sg->offset), sg->length);
+ }
}
return nents;
