igb: fix tx data corruption with transition to L0s on 82575

#include <linux/ethtool.h>

#include <linux/if_vlan.h>

#include <linux/pci.h>

#include <linux/pci-aspm.h>

#include <linux/delay.h>

#include <linux/interrupt.h>

#include <linux/if_ether.h>

	struct net_device *netdev;

	struct igb_adapter *adapter;

	struct e1000_hw *hw;

	struct pci_dev *us_dev;

	const struct e1000_info *ei = igb_info_tbl[ent->driver_data];

	unsigned long mmio_start, mmio_len;

	int i, err, pci_using_dac;

	u16 eeprom_data = 0;

	int i, err, pci_using_dac, pos;

	u16 eeprom_data = 0, state = 0;

	u16 eeprom_apme_mask = IGB_EEPROM_APME;

	u32 part_num;

	int bars, need_ioport;

		}

	}

	/* 82575 requires that the pci-e link partner disable the L0s state */

	switch (pdev->device) {

	case E1000_DEV_ID_82575EB_COPPER:

	case E1000_DEV_ID_82575EB_FIBER_SERDES:

	case E1000_DEV_ID_82575GB_QUAD_COPPER:

		us_dev = pdev->bus->self;

		pos = pci_find_capability(us_dev, PCI_CAP_ID_EXP);

		if (pos) {

			pci_read_config_word(us_dev, pos + PCI_EXP_LNKCTL,

			                     &state);

			state &= ~PCIE_LINK_STATE_L0S;

			pci_write_config_word(us_dev, pos + PCI_EXP_LNKCTL,

			                      state);

			printk(KERN_INFO "Disabling ASPM L0s upstream switch "

			       "port %x:%x.%x\n", us_dev->bus->number,

			       PCI_SLOT(us_dev->devfn),

			       PCI_FUNC(us_dev->devfn));

		}

	default:

		break;

	}

	err = pci_request_selected_regions(pdev, bars, igb_driver_name);

	if (err)

		goto err_pci_reg;