net: sh_eth: Fix timing of RACT setting in sh_eth_rx()

This patch fixes an issue that we cannot use nfs rootfs correctly
on r8a7790 when the command below runs on a host PC.

 $ sudo ping -f -l 8 $BOARD_IP_ADDR

Since the driver sets the RACT to 1 in the first while loop of
sh_eth_rx(), the controller accepts a next frame into the next RX
descriptor during the while loop. But, in the first while loop
doesn't allocate a next skb. So, this patch removes the RACT setting
in the first while loop of sh_eth_rx().

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 1b72a0fc9c308d9f3255c177945cf383c3c82b0e)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 1b34ac0..10af820 100644 (file)
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -1460,7 +1460,6 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
                        ndev->stats.rx_packets++;
                        ndev->stats.rx_bytes += pkt_len;
                }
-               rxdesc->status |= cpu_to_edmac(mdp, RD_RACT);
                entry = (++mdp->cur_rx) % mdp->num_rx_ring;
                rxdesc = &mdp->rx_ring[entry];
        }