Intel IOMMU could be turned off with intel_iommu=off. If Intel
IOMMU is off, the intel_iommu struct will not be initialized.
When device drivers call intel_svm_bind_mm(), the NULL pointer
reference will happen there.
Add dmar_disabled check to avoid NULL pointer reference.
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reported-by: Dave Jiang <dave.jiang@intel.com>
Fixes: 2f26e0a9c9860 ("iommu/vt-d: Add basic SVM PASID support")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
int pasid_max;
int ret;
- if (!iommu)
+ if (!iommu || dmar_disabled)
return -EINVAL;
if (dev_is_pci(dev)) {