[SPARC]: Fix iommu_flush_iotlb end address
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 <breuerr@mc.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c
index 77840c8..7215849 100644
--- a/arch/sparc/mm/iommu.c
+++ b/arch/sparc/mm/iommu.c
@@ -144,8 +144,9 @@
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);