diff options
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 459247c32dc0..bac4e20a5919 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -201,6 +201,7 @@ static struct iommu_dev_data *alloc_dev_data(u16 devid) if (!dev_data) return NULL; + spin_lock_init(&dev_data->lock); dev_data->devid = devid; ratelimit_default_init(&dev_data->rs); @@ -2157,6 +2158,8 @@ static int attach_device(struct device *dev, dev_data = get_dev_data(dev); + spin_lock(&dev_data->lock); + ret = -EBUSY; if (dev_data->domain != NULL) goto out; @@ -2199,6 +2202,8 @@ skip_ats_check: domain_flush_complete(domain); out: + spin_unlock(&dev_data->lock); + spin_unlock_irqrestore(&domain->lock, flags); return ret; @@ -2218,6 +2223,8 @@ static void detach_device(struct device *dev) spin_lock_irqsave(&domain->lock, flags); + spin_lock(&dev_data->lock); + /* * First check if the device is still attached. It might already * be detached from its domain because the generic @@ -2240,6 +2247,8 @@ static void detach_device(struct device *dev) dev_data->ats.enabled = false; out: + spin_unlock(&dev_data->lock); + spin_unlock_irqrestore(&domain->lock, flags); } |