netdev - [PATCH] ibm_newemac: Increase MDIO timeouts

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Message-Id: <20080423051832.63BF7DDF65@ozlabs.org>
Date:	Wed, 23 Apr 2008 15:17:14 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	<jgarzik@...ox.com>
CC:	<netdev@...r.kernel.org>, <linuxppc-dev@...abs.org>,
	<super.firetwister@...glemail.com>
Subject: [PATCH] ibm_newemac: Increase MDIO timeouts

This patch doubles the MDIO timeouts in EMAC as there are field
cases where they are two short to communicate with some PHYs.

Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---

 drivers/net/ibm_newemac/core.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- linux-work.orig/drivers/net/ibm_newemac/core.c	2008-04-23 15:11:16.000000000 +1000
+++ linux-work/drivers/net/ibm_newemac/core.c	2008-04-23 15:14:20.000000000 +1000
@@ -738,7 +738,7 @@ static int __emac_mdio_read(struct emac_
 		rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
 
 	/* Wait for management interface to become idle */
-	n = 10;
+	n = 20;
 	while (!emac_phy_done(dev, in_be32(&p->stacr))) {
 		udelay(1);
 		if (!--n) {
@@ -763,7 +763,7 @@ static int __emac_mdio_read(struct emac_
 	out_be32(&p->stacr, r);
 
 	/* Wait for read to complete */
-	n = 100;
+	n = 200;
 	while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
 		udelay(1);
 		if (!--n) {
@@ -810,7 +810,7 @@ static void __emac_mdio_write(struct ema
 		rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
 
 	/* Wait for management interface to be idle */
-	n = 10;
+	n = 20;
 	while (!emac_phy_done(dev, in_be32(&p->stacr))) {
 		udelay(1);
 		if (!--n) {
@@ -836,7 +836,7 @@ static void __emac_mdio_write(struct ema
 	out_be32(&p->stacr, r);
 
 	/* Wait for write to complete */
-	n = 100;
+	n = 200;
 	while (!emac_phy_done(dev, in_be32(&p->stacr))) {
 		udelay(1);
 		if (!--n) {
--
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