Xen devel - Dec 2005 - [PATCH] Unmap io shared page only if it is properly initialized

Unmap io shared page only if it is properly initialized.

Signed-off-by: Xin Li <xin.b.li@intel.com>


diff -r dc8122d90670 xen/arch/x86/vmx.c
--- a/xen/arch/x86/vmx.c    Wed Dec 14 18:47:16 2005
+++ b/xen/arch/x86/vmx.c    Thu Dec 15 16:32:00 2005
@@ -102,7 +102,8 @@
     if (v->vcpu_id == 0) {
         /* unmap IO shared page */
         struct domain *d = v->domain;
-        unmap_domain_page((void *)d->arch.vmx_platform.shared_page_va);
+        if ( d->arch.vmx_platform.shared_page_va )
+            unmap_domain_page((void
*)d->arch.vmx_platform.shared_page_va);
     }

     destroy_vmcs(&v->arch.arch_vmx);


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