Re: [PATCH] fix tulip suspend/resume

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Tue, 2005-06-07 at 00:46 +0200, Karsten Keil wrote:
> Hi,
> 
> following patch fix the suspend/resume for tulip based
> cards, so suspend on disk work now for me and tulip based
> cardbus cards.
> 
> 
> Signed-off-by: Karsten Keil <kkeil@suse.de>
> 
> --- linux/drivers/net/tulip/tulip_core.c.orig	2005-03-23 23:54:43.000000000 +0100
> +++ linux/drivers/net/tulip/tulip_core.c	2005-05-26 17:29:14.000000000 +0200
> @@ -1755,12 +1755,16 @@
>  static int tulip_suspend (struct pci_dev *pdev, pm_message_t state)
>  {
>  	struct net_device *dev = pci_get_drvdata(pdev);
> +	int err;
>  
> +	pci_save_state(pdev);
>  	if (dev && netif_running (dev) && netif_device_present (dev)) {
>  		netif_device_detach (dev);
>  		tulip_down (dev);
>  		/* pci_power_off(pdev, -1); */
>  	}
> +	if ((err = pci_set_power_state(pdev, PCI_D3hot)))
> +		printk(KERN_ERR "%s: pci_set_power_state D3hot return %d\n", dev->name, err);
>  	return 0;
>  }

It should probably test for message state, it's not worth doing
pci_set_power_state(D3) if PMSG_FREEZE is passed... (just slows down
suspend to disk)

> @@ -1768,7 +1772,11 @@
>  static int tulip_resume(struct pci_dev *pdev)
>  {
>  	struct net_device *dev = pci_get_drvdata(pdev);
> +	int err;
>  
> +	if ((err = pci_set_power_state(pdev, PCI_D0)))
> +		printk(KERN_ERR "%s: pci_set_power_state D0 return %d\n", dev->name, err);
> +	pci_restore_state(pdev);
>  	if (dev && netif_running (dev) && !netif_device_present (dev)) {
>  #if 1
>  		pci_enable_device (pdev);
> 

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