ppc4xx: Change receive buffer handling in the 4xx emac driver
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>
diff --git a/cpu/ppc4xx/4xx_enet.c b/cpu/ppc4xx/4xx_enet.c
index 1200d02..b90363f 100644
--- a/cpu/ppc4xx/4xx_enet.c
+++ b/cpu/ppc4xx/4xx_enet.c
@@ -1415,10 +1415,8 @@
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 @@
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)