diff options
| -rw-r--r-- | drivers/iommu/amd_iommu_v2.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c index 8add9f125d3..036fe9bf157 100644 --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -921,7 +921,16 @@ static int __init amd_iommu_v2_init(void) size_t state_table_size; int ret; - pr_info("AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@amd.com>"); + pr_info("AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@amd.com>\n"); + + if (!amd_iommu_v2_supported()) { + pr_info("AMD IOMMUv2 functionality not available on this sytem\n"); + /* + * Load anyway to provide the symbols to other modules + * which may use AMD IOMMUv2 optionally. + */ + return 0; + } spin_lock_init(&state_lock); @@ -961,6 +970,9 @@ static void __exit amd_iommu_v2_exit(void) size_t state_table_size; int i; + if (!amd_iommu_v2_supported()) + return; + profile_event_unregister(PROFILE_TASK_EXIT, &profile_nb); amd_iommu_unregister_ppr_notifier(&ppr_nb); |