Hi Dave,
iommu->root_entry_old_virt is used to store the mapped old rta.
iommu->root_entry_old_phys is used to store the physical address stored
in registers.
So we must not free/unmap iommu->root_entry_old_phys .
Zhenhua
On 05/13/2015 04:56 PM, Baoquan He wrote:
+
+ iommu->root_entry_old_phys = q & VTD_PAGE_MASK;
+ if (!iommu->root_entry_old_phys) {
+ pr_err("Could not read old root entry address.");
+ return -1;
+ }
+
I didn't find where you call iounmap to free mapping of
iommu->root_entry_old_phys. Am I missing anything?
+ iommu->root_entry_old_virt = ioremap_cache(iommu->root_entry_old_phys,
+ VTD_PAGE_SIZE);
+ if (!iommu->root_entry_old_virt) {
+ pr_err("Could not map the old root entry.");
+ return -ENOMEM;
+ }
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