diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 27 |
1 files changed, 2 insertions, 25 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 64d30895a4c8..1f2cd43cf9bc 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -3019,13 +3019,7 @@ static int __init init_dmars(void) #ifdef CONFIG_INTEL_IOMMU_SVM if (pasid_supported(iommu) && ecap_prs(iommu->ecap)) { - /* - * Call dmar_alloc_hwirq() with dmar_global_lock held, - * could cause possible lock race condition. - */ - up_write(&dmar_global_lock); ret = intel_svm_enable_prq(iommu); - down_write(&dmar_global_lock); if (ret) goto free_iommu; } @@ -3938,7 +3932,6 @@ int __init intel_iommu_init(void) force_on = (!intel_iommu_tboot_noforce && tboot_force_iommu()) || platform_optin_force_iommu(); - down_write(&dmar_global_lock); if (dmar_table_init()) { if (force_on) panic("tboot: Failed to initialize DMAR table\n"); @@ -3951,16 +3944,6 @@ int __init intel_iommu_init(void) goto out_free_dmar; } - up_write(&dmar_global_lock); - - /* - * The bus notifier takes the dmar_global_lock, so lockdep will - * complain later when we register it under the lock. - */ - dmar_register_bus_notifier(); - - down_write(&dmar_global_lock); - if (!no_iommu) intel_iommu_debugfs_init(); @@ -4005,11 +3988,9 @@ int __init intel_iommu_init(void) pr_err("Initialization failed\n"); goto out_free_dmar; } - up_write(&dmar_global_lock); init_iommu_pm_ops(); - down_read(&dmar_global_lock); for_each_active_iommu(iommu, drhd) { /* * The flush queue implementation does not perform @@ -4027,13 +4008,11 @@ int __init intel_iommu_init(void) "%s", iommu->name); iommu_device_register(&iommu->iommu, &intel_iommu_ops, NULL); } - up_read(&dmar_global_lock); bus_set_iommu(&pci_bus_type, &intel_iommu_ops); if (si_domain && !hw_pass_through) register_memory_notifier(&intel_iommu_memory_nb); - down_read(&dmar_global_lock); if (probe_acpi_namespace_devices()) pr_warn("ACPI name space devices didn't probe correctly\n"); @@ -4044,17 +4023,15 @@ int __init intel_iommu_init(void) iommu_disable_protect_mem_regions(iommu); } - up_read(&dmar_global_lock); - - pr_info("Intel(R) Virtualization Technology for Directed I/O\n"); intel_iommu_enabled = 1; + dmar_register_bus_notifier(); + pr_info("Intel(R) Virtualization Technology for Directed I/O\n"); return 0; out_free_dmar: intel_iommu_free_dmars(); - up_write(&dmar_global_lock); return ret; } |