[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>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c
index 77840c804786..7215849db392 100644
--- a/arch/sparc/mm/iommu.c
+++ b/arch/sparc/mm/iommu.c
@@ -144,8 +144,9 @@ static void iommu_flush_iotlb(iopte_t *iopte, unsigned int niopte)
         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);