Get iommu from g_iommus for deferred flush

deferred_flush[] uses the iommu seq_id to index, so its iommu is fixed and can get it from g_iommus.

Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index d2ffa7a6d7235026bebb729b0060f03c90da83cb..86b9f58a645ea22224bc011ad66095943ecf4cb0 100644 (file)
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -2101,10 +2101,11 @@ static void flush_unmaps(void)
 
        /* just flush them all */
        for (i = 0; i < g_num_of_iommus; i++) {
-               if (deferred_flush[i].next) {
-                       struct intel_iommu *iommu =
-                               deferred_flush[i].domain[0]->iommu;
+               struct intel_iommu *iommu = g_iommus[i];
+               if (!iommu)
+                       continue;
 
+               if (deferred_flush[i].next) {
                        iommu->flush.flush_iotlb(iommu, 0, 0, 0,
                                                 DMA_TLB_GLOBAL_FLUSH, 0);
                        for (j = 0; j < deferred_flush[i].next; j++) {