From: Prasad J Pandit <p...@fedoraproject.org>
ColdFire Fast Ethernet Controller uses a receive buffer size
register(EMRBR) to hold maximum size of all receive buffers.
It is set by a user before any operation. If it was set to be
zero, ColdFire emulator would go into an infinite loop while
receiving data in mcf_fec_receive. Add check to avoid it.
Reported-by: Wjjzhang <wjjzh...@tencent.com>
Signed-off-by: Prasad J Pandit <p...@fedoraproject.org>
Signed-off-by: Jason Wang <jasow...@redhat.com>
---
hw/net/mcf_fec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/net/mcf_fec.c b/hw/net/mcf_fec.c
index dc61bac..4025eb3 100644
--- a/hw/net/mcf_fec.c
+++ b/hw/net/mcf_fec.c
@@ -393,7 +393,7 @@ static void mcf_fec_write(void *opaque, hwaddr addr,
s->tx_descriptor = s->etdsr;
break;
case 0x188:
- s->emrbr = value & 0x7f0;
+ s->emrbr = value > 0 ? value & 0x7F0 : 0x7F0;
break;
default:
hw_error("mcf_fec_write Bad address 0x%x\n", (int)addr);
--
2.7.4
