From: Prasad J Pandit <[email protected]> ColdFire Fast Ethernet Controller uses buffer descriptors to manage data flow to/fro receive & transmit queues. While transmitting packets, it could continue to read buffer descriptors if a buffer descriptor has length of zero. Add check to avoid it.
Reported-by: Li Qiang <[email protected]> Signed-off-by: Prasad J Pandit <[email protected]> --- 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 7c0398e..f193e15 100644 --- a/hw/net/mcf_fec.c +++ b/hw/net/mcf_fec.c @@ -161,7 +161,7 @@ static void mcf_fec_do_tx(mcf_fec_state *s) mcf_fec_read_bd(&bd, addr); DPRINTF("tx_bd %x flags %04x len %d data %08x\n", addr, bd.flags, bd.length, bd.data); - if ((bd.flags & FEC_BD_R) == 0) { + if (!bd.length || (bd.flags & FEC_BD_R) == 0) { /* Run out of descriptors to transmit. */ break; } -- 2.5.5
