From: Stephen Hemminger <shemminger@osdl.org>
Date: Mon, 9 Oct 2006 22:49:27 +0000 (-0700)
Subject: [PATCH] sky2: set lower pause threshold to prevent overrun
X-Git-Tag: v2.6.19-rc2~23^2~1
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6e532cfe49b6e961e1260642a44959b645e9ab54;p=linux-2.6

[PATCH] sky2: set lower pause threshold to prevent overrun

Adjust the pause threshold on slower systems to keep from getting overrun.
Since FIFO is 2K bytes, don't send XON pause until there is space for a full
frame.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 1f91f30f4c..c10e7f5faa 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -683,7 +683,7 @@ static void sky2_mac_init(struct sky2_hw *hw, unsigned port)
 	sky2_write16(hw, SK_REG(port, TX_GMF_CTRL_T), GMF_OPER_ON);
 
 	if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
-		sky2_write8(hw, SK_REG(port, RX_GMF_LP_THR), 768/8);
+		sky2_write8(hw, SK_REG(port, RX_GMF_LP_THR), 512/8);
 		sky2_write8(hw, SK_REG(port, RX_GMF_UP_THR), 1024/8);
 		if (hw->dev[port]->mtu > ETH_DATA_LEN) {
 			/* set Tx GMAC FIFO Almost Empty Threshold */