Commit 77d54985 authored by Prasad J Pandit's avatar Prasad J Pandit Committed by Jason Wang
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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: default avatarWjjzhang <wjjzhang@tencent.com>
Signed-off-by: default avatarPrasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
parent bd8ef506

hw/net/mcf_fec.c

+1 −1
Original line number Diff line number Diff line
@@ -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);