From 2e87c5b937444c1155073f7b10d630e0e383e5d8 Mon Sep 17 00:00:00 2001
From: Jan Kiszka <jan.kiszka@web.de>
Date: Fri, 18 Sep 2009 20:51:22 +0200
Subject: musicpal: Catch null TX qeueues

They likely represent invalid queues that should be skipped. We already
do this for RX queues. Wish I had a spec...

Credits go to malc for analyzing the issue and suggesting this fix.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 hw/musicpal.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/hw/musicpal.c b/hw/musicpal.c
index 1c4f17c..c8f0235 100644
--- a/hw/musicpal.c
+++ b/hw/musicpal.c
@@ -238,7 +238,9 @@ static void eth_send(mv88w8618_eth_state *s, int queue_index)
     uint8_t buf[2048];
     int len;
 
-
+    if (!desc_addr) {
+        return;
+    }
     do {
         eth_tx_desc_get(desc_addr, &desc);
         if (desc.cmdstat & MP_ETH_TX_OWN) {
-- 
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