diff options
Diffstat (limited to 'drivers/iommu/iommu.c')
| -rw-r--r-- | drivers/iommu/iommu.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index da340f11c5f5..bdc5ce884b7b 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -351,9 +351,16 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list * but for now enforcing a simple global ordering is fine. */ mutex_lock(&iommu_probe_device_lock); + + /* Device is probed already if in a group */ + if (dev->iommu_group) { + ret = 0; + goto out_unlock; + } + if (!dev_iommu_get(dev)) { ret = -ENOMEM; - goto err_unlock; + goto out_unlock; } if (!try_module_get(ops->owner)) { @@ -399,7 +406,7 @@ out_module_put: err_free: dev_iommu_free(dev); -err_unlock: +out_unlock: mutex_unlock(&iommu_probe_device_lock); return ret; @@ -1711,16 +1718,8 @@ struct iommu_domain *iommu_group_default_domain(struct iommu_group *group) static int probe_iommu_group(struct device *dev, void *data) { struct list_head *group_list = data; - struct iommu_group *group; int ret; - /* Device is probed already if in a group */ - group = iommu_group_get(dev); - if (group) { - iommu_group_put(group); - return 0; - } - ret = __iommu_probe_device(dev, group_list); if (ret == -ENODEV) ret = 0; |