Xen devel - Dec 2005 - [PATCH] check before relinquishing vlapic because VMX domain may crash very early

check before relinquishing vlapic because VMX domain may crash very
early.

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

Also pls push to xen-3.0-testing.hg.

thanks

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 16:18:14 2005
@@ -113,9 +113,10 @@
     if ( active_ac_timer(&v->arch.arch_vmx.hlt_timer) ) {
         rem_ac_timer(&v->arch.arch_vmx.hlt_timer);
     }
-    if ( vmx_apic_support(v->domain) ) {
-        rem_ac_timer( &(VLAPIC(v)->vlapic_timer) );
-        xfree( VLAPIC(v) );
+    if ( vmx_apic_support(v->domain) && (VLAPIC(v) != NULL) ) {
+        if ( active_ac_timer(&(VLAPIC(v)->vlapic_timer)) )
+            rem_ac_timer(&(VLAPIC(v)->vlapic_timer));
+        xfree(VLAPIC(v));
     }
 }


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