net/ethernet/jme: disable ASPM

Based on patch from Matthew Garrett <mjg@redhat.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@gmail.com>
Cc: Guo-Fu Tseng <cooldavid@cooldavid.org>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/jme.c b/drivers/net/ethernet/jme.c
index c911d88..f8064df 100644 (file)
--- 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");