avoid clobbering exit_reason

@@ -388,7 +388,9 @@ int kvmppc_handle_exit(struct kvm_run *r
 
        kvmppc_check_and_deliver_interrupts(vcpu);
 
-       if (signal_pending(current)) {
+       /* Only check for signals if we aren't already exiting for some other
+        * reason. This keeps us from clobbering exit_reason. */
+       if (!(r & RESUME_HOST) && signal_pending(current)) {
                run->exit_reason = KVM_EXIT_INTR;
                r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
        }