KVM: MTRR: Use default type for non-MTRR-covered gfn before WARN_ON

The patch was munged on commit to re-order these tests resulting in
excessive warnings when trying to do device assignment.  Return to
original ordering: https://lkml.org/lkml/2015/7/15/769

Fixes: 3e5d2fdc ("KVM: MTRR: simplify kvm_mtrr_get_guest_memory_type")
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Reviewed-by: NXiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/mtrr.c

@@ -672,16 +672,16 @@ u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn)
 	if (iter.mtrr_disabled)
 		return mtrr_disabled_type();
 
+	/* not contained in any MTRRs. */
+	if (type == -1)
+		return mtrr_default_type(mtrr_state);
+
 	/*
 	 * We just check one page, partially covered by MTRRs is
 	 * impossible.
 	 */
 	WARN_ON(iter.partial_map);
 
-	/* not contained in any MTRRs. */
-	if (type == -1)
-		return mtrr_default_type(mtrr_state);
-
 	return type;
 }
 EXPORT_SYMBOL_GPL(kvm_mtrr_get_guest_memory_type);