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Commit 42bfd33a authored by Taku Izumi's avatar Taku Izumi Committed by Jeff Garzik
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igb: make ioport free 



This patch makes igb driver ioport-free.
This corrects behavior in probe function so as not to request ioport
resources as long as they are not really needed.

Signed-off-by: default avatarTaku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 6e4f6f6b

drivers/net/igb/igb.h

+4 −0
Original line number Diff line number Diff line
@@ -271,6 +271,10 @@ struct igb_adapter { 
	unsigned int msi_enabled;



	u32 eeprom_wol;



	/* for ioport free */

	int bars;

	int need_ioport;

};



enum e1000_state_t {

drivers/net/igb/igb_main.c

+41 −6
Original line number Diff line number Diff line
@@ -819,6 +819,21 @@ void igb_reset(struct igb_adapter *adapter) 
		adapter->hw.phy.ops.get_phy_info(&adapter->hw);

}



/**

 * igb_is_need_ioport - determine if an adapter needs ioport resources or not

 * @pdev: PCI device information struct

 *

 * Returns true if an adapter needs ioport resources

 **/

static int igb_is_need_ioport(struct pci_dev *pdev)

{

	switch (pdev->device) {

	/* Currently there are no adapters that need ioport resources */

	default:

		return false;

	}

}



/**

 * igb_probe - Device Initialization Routine

 * @pdev: PCI device information struct
@@ -843,8 +858,17 @@ static int __devinit igb_probe(struct pci_dev *pdev, 
	u16 eeprom_data = 0;

	u16 eeprom_apme_mask = IGB_EEPROM_APME;

	u32 part_num;

	int bars, need_ioport;



	/* do not allocate ioport bars when not needed */

	need_ioport = igb_is_need_ioport(pdev);

	if (need_ioport) {

		bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);

		err = pci_enable_device(pdev);

	} else {

		bars = pci_select_bars(pdev, IORESOURCE_MEM);

		err = pci_enable_device_mem(pdev);

	}

	if (err)

		return err;
@@ -866,7 +890,7 @@ static int __devinit igb_probe(struct pci_dev *pdev, 
		}

	}



	err = pci_request_regions(pdev, igb_driver_name);

	err = pci_request_selected_regions(pdev, bars, igb_driver_name);

	if (err)

		goto err_pci_reg;
@@ -887,6 +911,8 @@ static int __devinit igb_probe(struct pci_dev *pdev, 
	hw = &adapter->hw;

	hw->back = adapter;

	adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE;

	adapter->bars = bars;

	adapter->need_ioport = need_ioport;



	mmio_start = pci_resource_start(pdev, 0);

	mmio_len = pci_resource_len(pdev, 0);
@@ -1127,7 +1153,7 @@ static int __devinit igb_probe(struct pci_dev *pdev, 
err_ioremap:

	free_netdev(netdev);

err_alloc_etherdev:

	pci_release_regions(pdev);

	pci_release_selected_regions(pdev, bars);

err_pci_reg:

err_dma:

	pci_disable_device(pdev);
@@ -1174,7 +1200,7 @@ static void __devexit igb_remove(struct pci_dev *pdev) 
	iounmap(adapter->hw.hw_addr);

	if (adapter->hw.flash_address)

		iounmap(adapter->hw.flash_address);

	pci_release_regions(pdev);

	pci_release_selected_regions(pdev, adapter->bars);



	free_netdev(netdev);
@@ -3975,7 +4001,11 @@ static int igb_resume(struct pci_dev *pdev) 


	pci_set_power_state(pdev, PCI_D0);

	pci_restore_state(pdev);



	if (adapter->need_ioport)

		err = pci_enable_device(pdev);

	else

		err = pci_enable_device_mem(pdev);

	if (err) {

		dev_err(&pdev->dev,

			"igb: Cannot enable PCI device from suspend\n");
@@ -4078,8 +4108,13 @@ static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev) 
	struct net_device *netdev = pci_get_drvdata(pdev);

	struct igb_adapter *adapter = netdev_priv(netdev);

	struct e1000_hw *hw = &adapter->hw;

	int err;



	if (pci_enable_device(pdev)) {

	if (adapter->need_ioport)

		err = pci_enable_device(pdev);

	else

		err = pci_enable_device_mem(pdev);

	if (err) {

		dev_err(&pdev->dev,

			"Cannot re-enable PCI device after reset.\n");

		return PCI_ERS_RESULT_DISCONNECT;