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ppc4xx: Change receive buffer handling in the 4xx emac driver

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This change fixes a bug in the receive buffer handling, that
could lead to problems upon high network traffic (broadcasts...).

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2007-07-12 16:32:08 +02:00
parent 53629f439c
commit a2e1c7098c
1 changed files with 5 additions and 3 deletions
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8
cpu/ppc4xx/4xx_enet.c
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@ -1415,10 +1415,8 @@ static void enet_rcv (struct eth_device *dev, unsigned long malisr)
if ((MAL_RX_CTRL_EMPTY & hw_p->rx[i].ctrl)
|| (loop_count >= NUM_RX_BUFF))
break;
loop_count++;
hw_p->rx_slot++;
if (NUM_RX_BUFF == hw_p->rx_slot)
hw_p->rx_slot = 0;
handled++;
data_len = (unsigned long) hw_p->rx[i].data_len; /* Get len */
if (data_len) {
@ -1468,6 +1466,10 @@ static void enet_rcv (struct eth_device *dev, unsigned long malisr)
if (NUM_RX_BUFF == hw_p->rx_i_index)
hw_p->rx_i_index = 0;
hw_p->rx_slot++;
if (NUM_RX_BUFF == hw_p->rx_slot)
hw_p->rx_slot = 0;
/* AS.HARNOIS
* free receive buffer only when
* buffer has been handled (eth_rx)