[Xen-devel] [PATCH] x86-64/mmcfg: fix pci_mmcfg_arch_free()

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

While only used on error paths so far, it should still actually do
something (which iounmap(), being an empty stub, doesn't).

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- a/xen/arch/x86/x86_64/mmconfig_64.c
+++ b/xen/arch/x86/x86_64/mmconfig_64.c
@@ -166,7 +166,12 @@ void __init pci_mmcfg_arch_free(void)
 
     for (i = 0; i < pci_mmcfg_config_num; ++i) {
         if (pci_mmcfg_virt[i].virt) {
-            iounmap(pci_mmcfg_virt[i].virt);
+            unsigned long size;
+            const struct acpi_mcfg_allocation *cfg = pci_mmcfg_virt[i].cfg;
+
+            size = (cfg->end_bus_number - cfg->start_bus_number + 1) << 20;
+            destroy_xen_mappings((unsigned long)pci_mmcfg_virt[i].virt,
+                                 (unsigned long)pci_mmcfg_virt[i].virt + size);
             pci_mmcfg_virt[i].virt = NULL;
             pci_mmcfg_virt[i].cfg = NULL;
         }

Attachment: x86_64-mmcfg-arch-free.patch
Description: Text document

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