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[SPARC]: Fix iommu_flush_iotlb end address

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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>
This commit is contained in:
Bob Breuer 2006-06-20 00:36:56 -07:00 committed by David S. Miller
parent 92d452f0eb
commit 3185d4d287
1 changed files with 2 additions and 1 deletions
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3
arch/sparc/mm/iommu.c
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@ -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);