intel-iommu: iommu init error path bug fixes
The kcalloc() failure path in iommu_init_domains() calls free_dmar_iommu(), which assumes that ->domains, ->domain_ids, and ->lock have been properly initialized. Add checks in free_[dmar]_iommu to not use ->domains,->domain_ids if not alloced. Move the lock init to prior to the kcalloc()'s, so it is valid in free_context_table() when free_dmar_iommu() invokes it at the end. Patch based on iommu-2.6, commit 13203227Signed-off-by: NDonald Dutile <ddutile@redhat.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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