From ba9adbe67e288823ac1deb7f11576ab5653f833e Mon Sep 17 00:00:00 2001 From: Guo-Fu Tseng Date: Wed, 22 Feb 2012 08:58:10 +0000 Subject: jme: Fix FIFO flush issue Set the RX FIFO flush watermark lower. According to Federico and JMicron's reply, setting it to 16QW would be stable on most platforms. Otherwise, user might experience packet drop issue. CC: stable@kernel.org Reported-by: Federico Quagliata Fixed-by: Federico Quagliata Signed-off-by: Guo-Fu Tseng Signed-off-by: David S. Miller diff --git a/drivers/net/ethernet/jme.c b/drivers/net/ethernet/jme.c index 27d651a..55cbf65 100644 --- a/drivers/net/ethernet/jme.c +++ b/drivers/net/ethernet/jme.c @@ -2328,19 +2328,11 @@ jme_change_mtu(struct net_device *netdev, int new_mtu) ((new_mtu) < IPV6_MIN_MTU)) return -EINVAL; - if (new_mtu > 4000) { - jme->reg_rxcs &= ~RXCS_FIFOTHNP; - jme->reg_rxcs |= RXCS_FIFOTHNP_64QW; - jme_restart_rx_engine(jme); - } else { - jme->reg_rxcs &= ~RXCS_FIFOTHNP; - jme->reg_rxcs |= RXCS_FIFOTHNP_128QW; - jme_restart_rx_engine(jme); - } netdev->mtu = new_mtu; netdev_update_features(netdev); + jme_restart_rx_engine(jme); jme_reset_link(jme); return 0; diff --git a/drivers/net/ethernet/jme.h b/drivers/net/ethernet/jme.h index 4304072b..3efc897 100644 --- a/drivers/net/ethernet/jme.h +++ b/drivers/net/ethernet/jme.h @@ -730,7 +730,7 @@ enum jme_rxcs_values { RXCS_RETRYCNT_60 = 0x00000F00, RXCS_DEFAULT = RXCS_FIFOTHTP_128T | - RXCS_FIFOTHNP_128QW | + RXCS_FIFOTHNP_16QW | RXCS_DMAREQSZ_128B | RXCS_RETRYGAP_256ns | RXCS_RETRYCNT_32, -- cgit v0.10.2