Should check dmar_disabled just after tboot_force_iommu.
Otherwise when tboot is not used, and intel_iommu=off, and nointrmap
still get dmar_table_init() called. that will cause some get_device
calling, and it will have some device refcount leaking.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
---
drivers/iommu/intel-iommu.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a3eb689..865a65c 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3681,6 +3681,9 @@ int __init intel_iommu_init(void)
/* VT-d is required for a TXT/tboot launch, so enforce that */
force_on = tboot_force_iommu();
+ if (no_iommu || dmar_disabled)
+ return -ENODEV;
+
if (dmar_table_init()) {
if (force_on)
panic("tboot: Failed to initialize DMAR table\n");
@@ -3707,9 +3710,6 @@ int __init intel_iommu_init(void)
return -ENODEV;
}
- if (no_iommu || dmar_disabled)
- return -ENODEV;
-
if (iommu_init_mempool()) {
if (force_on)
panic("tboot: Failed to initialize iommu memory\n");
--
1.8.4
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