netdev - [PATCH net-next-2.6 2/2] cxgb3: fix link flap

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Date:	Sat, 13 Feb 2010 11:44:35 -0800
From:	Divy Le Ray <divy@...lsio.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	swise@...ngridcomputing.com
Subject: [PATCH net-next-2.6 2/2] cxgb3: fix link flap

From: Divy Le Ray <divy@...lsio.com>

The driver is expected to report that the link is up
when the phy Rx signal is established and the mac
has not detected a link fault.
The code is however broken, the driver does not check the link fault
status when the phy link status changes.
The link fault status being checked within a short period of time,
it leads to link up/link down events.

Signed-off-by: Divy Le Ray <divy@...lsio.com>
---

 drivers/net/cxgb3/t3_hw.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)


diff --git a/drivers/net/cxgb3/t3_hw.c b/drivers/net/cxgb3/t3_hw.c
index 032cfe0..3ab9f51 100644
--- a/drivers/net/cxgb3/t3_hw.c
+++ b/drivers/net/cxgb3/t3_hw.c
@@ -1262,7 +1262,8 @@ void t3_link_changed(struct adapter *adapter, int port_id)
 		lc->fc = fc;
 	}
 
-	t3_os_link_changed(adapter, port_id, link_ok, speed, duplex, fc);
+	t3_os_link_changed(adapter, port_id, link_ok && !pi->link_fault,
+			   speed, duplex, fc);
 }
 
 void t3_link_fault(struct adapter *adapter, int port_id)

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