diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/arm-smmu-v3.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 15c01c3cd540..e6f9b2d745ca 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2636,17 +2636,26 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) /* And we're up. Go go go! */ of_iommu_set_ops(dev->of_node, &arm_smmu_ops); #ifdef CONFIG_PCI - pci_request_acs(); - ret = bus_set_iommu(&pci_bus_type, &arm_smmu_ops); - if (ret) - return ret; + if (pci_bus_type.iommu_ops != &arm_smmu_ops) { + pci_request_acs(); + ret = bus_set_iommu(&pci_bus_type, &arm_smmu_ops); + if (ret) + return ret; + } #endif #ifdef CONFIG_ARM_AMBA - ret = bus_set_iommu(&amba_bustype, &arm_smmu_ops); - if (ret) - return ret; + if (amba_bustype.iommu_ops != &arm_smmu_ops) { + ret = bus_set_iommu(&amba_bustype, &arm_smmu_ops); + if (ret) + return ret; + } #endif - return bus_set_iommu(&platform_bus_type, &arm_smmu_ops); + if (platform_bus_type.iommu_ops != &arm_smmu_ops) { + ret = bus_set_iommu(&platform_bus_type, &arm_smmu_ops); + if (ret) + return ret; + } + return 0; } static int arm_smmu_device_remove(struct platform_device *pdev) |