Merge branches 'acpi-scan', 'acpi-processor' and 'acpi-assorted'

[cascardo/linux.git] / drivers / iommu / amd_iommu.c

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 6d3dae9..658ee39 100644 (file)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2282,12 +2282,10 @@ static int amd_iommu_add_device(struct device *dev)
 
        /* Domains are initialized for this device - have a look what we ended up with */
        domain = iommu_get_domain_for_dev(dev);
-       if (domain->type == IOMMU_DOMAIN_IDENTITY) {
+       if (domain->type == IOMMU_DOMAIN_IDENTITY)
                dev_data->passthrough = true;
-               dev->archdata.dma_ops = &nommu_dma_ops;
-       } else {
+       else
                dev->archdata.dma_ops = &amd_iommu_dma_ops;
-       }
 
 out:
        iommu_completion_wait(iommu);
@@ -2852,8 +2850,17 @@ int __init amd_iommu_init_api(void)
 
 int __init amd_iommu_init_dma_ops(void)
 {
+       swiotlb        = iommu_pass_through ? 1 : 0;
        iommu_detected = 1;
-       swiotlb = 0;
+
+       /*
+        * In case we don't initialize SWIOTLB (actually the common case
+        * when AMD IOMMU is enabled), make sure there are global
+        * dma_ops set as a fall-back for devices not handled by this
+        * driver (for example non-PCI devices).
+        */
+       if (!swiotlb)
+               dma_ops = &nommu_dma_ops;
 
        amd_iommu_stats_init();
 
@@ -3311,7 +3318,12 @@ static int __flush_pasid(struct protection_domain *domain, int pasid,
                struct amd_iommu *iommu;
                int qdep;
 
-               BUG_ON(!dev_data->ats.enabled);
+               /*
+                  There might be non-IOMMUv2 capable devices in an IOMMUv2
+                * domain.
+                */
+               if (!dev_data->ats.enabled)
+                       continue;
 
                qdep  = dev_data->ats.qdep;
                iommu = amd_iommu_rlookup_table[dev_data->devid];