netdev - [patch 07/14] e1000: workaround for the ESB2 NIC RX unit issue

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Message-Id: <1166175343.3365.123.camel@laptopd505.fenrus.org>
Date:	Fri, 15 Dec 2006 10:35:43 +0100
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	netdev@...r.kernel.org
Subject: [patch 07/14] e1000: workaround for the ESB2 NIC RX unit issue

Subject: e1000: workaround for the ESB2 NIC RX unit issue
From: Jesse Brandeburg <jesse.brandeburg@...el.com>

In rare occasions, ESB2 systems would end up started without the RX
unit being turned on. Add a check that runs post-init to work around this
issue.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@...el.com>
Signed-off-by: Arjan van de Ven <arjan@...ux.intel.com>
---

 drivers/net/e1000/e1000_main.c |    7 +++++++
 1 file changed, 7 insertions(+)

Index: linux-2.6/drivers/net/e1000/e1000_main.c
===================================================================
--- linux-2.6.orig/drivers/net/e1000/e1000_main.c
+++ linux-2.6/drivers/net/e1000/e1000_main.c
@@ -2579,6 +2579,13 @@ e1000_watchdog(unsigned long data)
 			netif_wake_queue(netdev);
 			mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
 			adapter->smartspeed = 0;
+		} else {
+			/* make sure the receive unit is started */
+			if (adapter->hw.mac_type == e1000_80003es2lan) {
+				struct e1000_hw *hw = &adapter->hw;
+				uint32_t rctl = E1000_READ_REG(hw, RCTL);
+				E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
+			}
 		}
 	} else {
 		if (netif_carrier_ok(netdev)) {

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