From ff472a5badf8e6d964455de39ca67ea3a7758dea Mon Sep 17 00:00:00 2001
From: Alyssa Milburn <fuzzie@fuzzie.org>
Date: Fri, 22 Jan 2016 23:07:24 +0000
Subject: [PATCH] cuda.c: return error for unknown commands

This avoids MacsBug hanging at startup in the absence of ADB mouse
input, by replying with an error (which is also what MOL does) when
it sends an unknown command (0x1c).

Signed-off-by: Alyssa Milburn <fuzzie@fuzzie.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/misc/macio/cuda.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/misc/macio/cuda.c b/hw/misc/macio/cuda.c
index 0bd90e8456..316c1ac8da 100644
--- a/hw/misc/macio/cuda.c
+++ b/hw/misc/macio/cuda.c
@@ -606,6 +606,11 @@ static void cuda_receive_packet(CUDAState *s,
         }
         break;
     default:
+        obuf[0] = ERROR_PACKET;
+        obuf[1] = 0x2;
+        obuf[2] = CUDA_PACKET;
+        obuf[3] = data[0];
+        cuda_send_packet_to_host(s, obuf, 4);
         break;
     }
 }