-stable review patch. If anyone has any objections, please let us know.
------------------
From: David Miller <[email protected]>
Fix the calculation of the end address when flushing iotlb entries to
ram. This bug has been a cause of esp dma errors, and it affects
HyperSPARC systems much worse than SuperSPARC systems.
Signed-off-by: Bob Breuer <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Chris Wright <[email protected]>
---
arch/sparc/mm/iommu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- linux-2.6.17.1.orig/arch/sparc/mm/iommu.c
+++ linux-2.6.17.1/arch/sparc/mm/iommu.c
@@ -144,8 +144,9 @@ static void iommu_flush_iotlb(iopte_t *i
unsigned long start;
unsigned long end;
- start = (unsigned long)iopte & PAGE_MASK;
+ start = (unsigned long)iopte;
end = PAGE_ALIGN(start + niopte*sizeof(iopte_t));
+ start &= PAGE_MASK;
if (viking_mxcc_present) {
while(start < end) {
viking_mxcc_flush_page(start);
--
-
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