diff options
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index c8fc02f..2175814 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -2075,8 +2075,20 @@ static struct platform_driver arm_smmu_driver = { static int __init arm_smmu_init(void) { + struct device_node *np; int ret; + /* + * Play nice with systems that don't have an ARM SMMU by checking that + * an ARM SMMU exists in the system before proceeding with the driver + * and IOMMU bus operation registration. + */ + np = of_find_matching_node(NULL, arm_smmu_of_match); + if (!np) + return 0; + + of_node_put(np); + ret = platform_driver_register(&arm_smmu_driver); if (ret) return ret; |
