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From c2e963057ca5635d6e5387623c3ad0c0b3123754 Mon Sep 17 00:00:00 2001
From: Daniel Hellstrom <daniel@gaisler.com>
Date: Wed, 1 Dec 2010 10:28:37 +0100
Subject: [PATCH] GRETH: avoid writing bad speed/duplex when setting transfer mode
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
---
drivers/net/greth.c | 19 ++++++++-----------
1 files changed, 8 insertions(+), 11 deletions(-)
--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
@@ -1236,29 +1236,26 @@ static void greth_link_change(struct net
struct greth_private *greth = netdev_priv(dev);
struct phy_device *phydev = greth->phy;
unsigned long flags;
-
int status_change = 0;
+ u32 ctrl;
spin_lock_irqsave(&greth->devlock, flags);
if (phydev->link) {
if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) {
-
- GRETH_REGANDIN(greth->regs->control,
- ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB));
+ ctrl = GRETH_REGLOAD(greth->regs->control) &
+ ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB);
if (phydev->duplex)
- GRETH_REGORIN(greth->regs->control, GRETH_CTRL_FD);
-
- if (phydev->speed == SPEED_100) {
-
- GRETH_REGORIN(greth->regs->control, GRETH_CTRL_SP);
- }
+ ctrl |= GRETH_CTRL_FD;
+ if (phydev->speed == SPEED_100)
+ ctrl |= GRETH_CTRL_SP;
else if (phydev->speed == SPEED_1000)
- GRETH_REGORIN(greth->regs->control, GRETH_CTRL_GB);
+ ctrl |= GRETH_CTRL_GB;
+ GRETH_REGSAVE(greth->regs->control, ctrl);
greth->speed = phydev->speed;
greth->duplex = phydev->duplex;
status_change = 1;
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