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iommu: Extend mutex lock scope in iommu_probe_device()

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Extend the scope of holding group->mutex so that it can cover the default
domain check/attachment and direct mappings of reserved regions.

Cc: Ashish Mhetre <amhetre@nvidia.com>
Fixes: 211ff31b3d ("iommu: Fix race condition during default domain allocation")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20211108061349.1985579-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2021-11-08 14:13:49 +08:00 committed by Joerg Roedel
parent 94aedac49d
commit 556f99ac88
1 changed files with 2 additions and 1 deletions
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3
drivers/iommu/iommu.c
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@ -288,11 +288,11 @@ int iommu_probe_device(struct device *dev)
*/
mutex_lock(&group->mutex);
iommu_alloc_default_domain(group, dev);
mutex_unlock(&group->mutex);
if (group->default_domain) {
ret = __iommu_attach_device(group->default_domain, dev);
if (ret) {
mutex_unlock(&group->mutex);
iommu_group_put(group);
goto err_release;
}
@ -300,6 +300,7 @@ int iommu_probe_device(struct device *dev)
iommu_create_device_direct_mappings(group, dev);
mutex_unlock(&group->mutex);
iommu_group_put(group);
if (ops->probe_finalize)