netdev - [PATCH] net/ethernet/jme: disable ASPM

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Message-Id: <1349722956-14159-1-git-send-email-kevin.baradon@gmail.com>
Date:	Mon,  8 Oct 2012 21:02:36 +0200
From:	Kevin Baradon <kevin.baradon@...il.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	Kevin Baradon <kevin.baradon@...il.com>,
	Guo-Fu Tseng <cooldavid@...ldavid.org>,
	Matthew Garrett <mjg@...hat.com>, netdev@...r.kernel.org
Subject: [PATCH] net/ethernet/jme: disable ASPM

Based on patch from Matthew Garrett <mjg@...hat.com> (https://lkml.org/lkml/2011/11/11/168).

http://driveragent.com/archive/30421/7-0-14 indicates that ASPM is
disabled on the 250 and 260. Duplicate for sanity.

Fixes random RX engine hangs I experienced with JMC250 on Clevo W270HU.

Signed-off-by: Kevin Baradon <kevin.baradon@...il.com>
Cc: Guo-Fu Tseng <cooldavid@...ldavid.org>
Cc: Matthew Garrett <mjg@...hat.com>
Cc: netdev@...r.kernel.org
---
 drivers/net/ethernet/jme.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/jme.c b/drivers/net/ethernet/jme.c
index c911d88..373df5a 100644
--- a/drivers/net/ethernet/jme.c
+++ b/drivers/net/ethernet/jme.c
@@ -27,6 +27,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
+#include <linux/pci-aspm.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
@@ -2973,6 +2974,9 @@ jme_init_one(struct pci_dev *pdev,
 	/*
 	 * set up PCI device basics
 	 */
+	pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
+		PCIE_LINK_STATE_CLKPM);
+
 	rc = pci_enable_device(pdev);
 	if (rc) {
 		pr_err("Cannot enable PCI device\n");
-- 
1.7.10.4

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