This is a note to let you know that I've just added the patch titled
jme: Fix FIFO flush issue
to the 3.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
jme-fix-fifo-flush-issue.patch
and it can be found in the queue-3.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From ba9adbe67e288823ac1deb7f11576ab5653f833e Mon Sep 17 00:00:00 2001
From: Guo-Fu Tseng <[email protected]>
Date: Wed, 22 Feb 2012 08:58:10 +0000
Subject: jme: Fix FIFO flush issue
From: Guo-Fu Tseng <[email protected]>
commit ba9adbe67e288823ac1deb7f11576ab5653f833e upstream.
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.
Reported-by: Federico Quagliata <[email protected]>
Fixed-by: Federico Quagliata <[email protected]>
Signed-off-by: Guo-Fu Tseng <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/ethernet/jme.c | 10 +---------
drivers/net/ethernet/jme.h | 2 +-
2 files changed, 2 insertions(+), 10 deletions(-)
--- a/drivers/net/ethernet/jme.c
+++ b/drivers/net/ethernet/jme.c
@@ -2328,19 +2328,11 @@ jme_change_mtu(struct net_device *netdev
((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;
--- 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,
Patches currently in stable-queue which might be from [email protected]
are
queue-3.2/jme-fix-fifo-flush-issue.patch
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