diff options
| author | Prasad J Pandit <pjp@fedoraproject.org> | 2016-11-29 00:38:39 +0530 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2016-12-05 17:45:14 +0800 |
| commit | 77d54985b85a0cb760330ec2bd92505e0a2a97a9 (patch) | |
| tree | eaf7e56b5d841ec16863a6ec33761dd555c9de55 /hw | |
| parent | bd8ef5060dd2124a54578241da9a572faf7658dd (diff) | |
net: mcf: check receive buffer size register value
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 <wjjzhang@tencent.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/net/mcf_fec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/net/mcf_fec.c b/hw/net/mcf_fec.c index dc61bac2fc..4025eb3b33 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); |