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authorGuo-Fu Tseng <cooldavid@cooldavid.org>2012-02-22 08:58:10 +0000
committerDavid S. Miller <davem@davemloft.net>2012-02-22 14:44:41 -0500
commitba9adbe67e288823ac1deb7f11576ab5653f833e (patch)
tree3641e0febbe8ebcbf649f1917b248ff11a08e6a3 /drivers
parent597cdbc2239e6019bbb2dd73b266f436166f0427 (diff)
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 <federico@quagliata.org> Fixed-by: Federico Quagliata <federico@quagliata.org> Signed-off-by: Guo-Fu Tseng <cooldavid@cooldavid.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/jme.c10
-rw-r--r--drivers/net/ethernet/jme.h2
2 files changed, 2 insertions, 10 deletions
diff --git a/drivers/net/ethernet/jme.c b/drivers/net/ethernet/jme.c
index 27d651a80f3..55cbf65512c 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 4304072bd3c..3efc897c991 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,