pseries/iommu: Fix iteration in DDW TCE clearrange

tce_clearrange_multi_pSeriesLP is attempting to iterate over all TCEs in
a given range. However, is it not advancing the dma_offset value passed
to plpar_tce_stuff via the next value. This prevents DLPAR from
completing, because TCEs are still present at slot isolation time.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index e2685badb5db1761c9621a486049361608f0742a..a55b6858ceacb3fc122a9a284503db7b8f90e81f 100644 (file)
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -382,6 +382,7 @@ static int tce_clearrange_multi_pSeriesLP(unsigned long start_pfn,
                rc = plpar_tce_stuff((u64)be32_to_cpu(maprange->liobn),
                                             dma_offset,
                                             0, limit);
+               next += limit * tce_size;
                num_tce -= limit;
        } while (num_tce > 0 && !rc);