From a2e1c7098cf9574386b0c96841dfc8ea5cc93578 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Thu, 12 Jul 2007 16:32:08 +0200 Subject: [PATCH] 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 --- cpu/ppc4xx/4xx_enet.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) 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 @@ 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) -- 2.7.4