diff options
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index ec5faf6db570..92241ffab455 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1915,15 +1915,6 @@ static void do_detach(struct iommu_dev_data *dev_data) struct amd_iommu *iommu; u16 alias; - /* - * First check if the device is still attached. It might already - * be detached from its domain because the generic - * iommu_detach_group code detached it and we try again here in - * our alias handling. - */ - if (!dev_data->domain) - return; - iommu = amd_iommu_rlookup_table[dev_data->devid]; alias = dev_data->alias; @@ -2128,9 +2119,6 @@ static void __detach_device(struct iommu_dev_data *dev_data) */ WARN_ON(!irqs_disabled()); - if (WARN_ON(!dev_data->domain)) - return; - domain = dev_data->domain; spin_lock(&domain->lock); @@ -2152,6 +2140,15 @@ static void detach_device(struct device *dev) dev_data = get_dev_data(dev); domain = dev_data->domain; + /* + * First check if the device is still attached. It might already + * be detached from its domain because the generic + * iommu_detach_group code detached it and we try again here in + * our alias handling. + */ + if (WARN_ON(!dev_data->domain)) + return; + /* lock device table */ spin_lock_irqsave(&amd_iommu_devtable_lock, flags); __detach_device(dev_data); @@ -2797,6 +2794,7 @@ static void cleanup_domain(struct protection_domain *domain) while (!list_empty(&domain->dev_list)) { entry = list_first_entry(&domain->dev_list, struct iommu_dev_data, list); + BUG_ON(!entry->domain); __detach_device(entry); } |