netdev - [PATCH 2/2 2.6.25-rc8] ixgbe: save and restore pcie/msi state to support EEH recovery

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Message-Id: <1207856434.24768.27.camel@wendyx.austin.ibm.com>
Date:	Thu, 10 Apr 2008 14:40:34 -0500
From:	wendy xiong <wendyx@...ibm.com>
To:	netdev@...r.kernel.org, jeff@...zik.org, auke-jan.h.kok@...el.com,
	jesse.brandeburg@...el.com, e1000-devel@...ts.sourceforge.net
Subject: [PATCH 2/2 2.6.25-rc8] ixgbe: save and restore pcie/msi state to
	support EEH recovery

Hi,

To enable EEH support for pci-express network adapters, pcie/msi state
needs to be saved and restored for that adapter.

We have tested this EEH patch with Intel 10G pci-express ixgbe adapter.

Signed-off-by: Wendy Xiong <wendyx@...ibm.com>


diff -Nuarp linux-2.6.25-rc8.orig/drivers/net/ixgbe/ixgbe_main.c linux-2.6.25-rc8/drivers/net/ixgbe/ixgbe_main.c
--- linux-2.6.25-rc8.orig/drivers/net/ixgbe/ixgbe_main.c        2008-04-07 19:18:08.000000000 -0500
+++ linux-2.6.25-rc8/drivers/net/ixgbe/ixgbe_main.c     2008-04-10 12:54:17.000000000 -0500
@@ -2654,6 +2654,7 @@ static int __devinit ixgbe_probe(struct
        }

        pci_set_master(pdev);
+       pci_save_state(pdev);

        netdev = alloc_etherdev(sizeof(struct ixgbe_adapter));
        if (!netdev) {
@@ -2910,6 +2911,7 @@ static pci_ers_result_t ixgbe_io_slot_re
                return PCI_ERS_RESULT_DISCONNECT;
        }
        pci_set_master(pdev);
+       pci_restore_state(pdev);

        pci_enable_wake(pdev, PCI_D3hot, 0);
        pci_enable_wake(pdev, PCI_D3cold, 0);




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