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iommu/intel catch null domain before de-referencing it #374

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SpencerSharkey wants to merge 2 commits into from
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iommu/intel catch null domain before de-referencing it #374

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d0670bb
Update intel-iommu.c
SpencerSharkey Dec 2, 2016
e066b5f
Update intel-iommu.c
SpencerSharkey Dec 2, 2016
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4 changes: 4 additions & 0 deletions drivers/iommu/intel-iommu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1565,6 +1565,10 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain,
u16 sid, qdep;
unsigned long flags;
struct device_domain_info *info;

/* device has already been flushed/unmapped? */
if (WARN_ON(!domain))
return;

if (!domain->has_iotlb_device)
return;
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