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iommu/vt-d: Missing checks for pasid tables if allocation fails

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intel_svm_alloc_pasid_tables() might return an error but never be
checked by the callers. Later when intel_svm_bind_mm() is called,
there are no checks for valid pasid tables before enabling them.

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Liu, Yi L <yi.l.liu@intel.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Lu Baolu 2017-11-03 10:51:32 -06:00 committed by Alex Williamson
parent a593472591
commit 2e2e35d512
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/intel-svm.c
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@ -292,7 +292,7 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
int pasid_max;
int ret;
if (WARN_ON(!iommu))
if (WARN_ON(!iommu || !iommu->pasid_table))
return -EINVAL;
if (dev_is_pci(dev)) {