linux-kernel - Re: [PATCH 4/8] staging: et131x: Add pci suspend & resume functions

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Message-ID: <CANK3SE3eHbBwzE5ZQJVoQEzw1QEE0bTp8Uf=CRpQEvNMiztPtg@mail.gmail.com>
Date:	Sat, 1 Oct 2011 15:02:29 +0100
From:	Mark Einon <mark.einon@...il.com>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, gregkh@...e.de,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	o.hartmann@...ovital.com, alan@...ux.intel.com
Subject: Re: [PATCH 4/8] staging: et131x: Add pci suspend & resume functions

On 1 October 2011 12:03, Francois Romieu <romieu@...zoreil.com> wrote:
> Mark Einon <mark.einon@...il.com> :
>> Added basic suspend & resume functionality.
>> Tested on an et1310 device, and putting Fedora15 host in and out of
>> hibernation successfully.
---
>> +static int et131x_pci_resume(struct pci_dev *pdev)
>> +{
>> +     struct net_device *netdev = pci_get_drvdata(pdev);
>> +     int err = 0;
>> +
>> +     if (!netif_running(netdev))
>> +             return 0;
>> +
>> +     pci_set_power_state(pdev, PCI_D0);
>> +     pci_restore_state(pdev);
>> +
>> +     err = et131x_open(netdev);
>> +     if (err) {
>> +             dev_err(&pdev->dev, "Can't resume interface!\n");
>> +             goto out;
>> +     }
>
> You can/should split et131x_{open/close} to remove this failure point.

Hi, thanks for the comments francois,
I'm not quite sure what you mean here. Can you expand on your comment please?

>
> [...]
>> @@ -884,8 +923,10 @@ static struct pci_driver et131x_driver = {
>>       .id_table       = et131x_pci_table,
>>       .probe          = et131x_pci_setup,
>>       .remove         = __devexit_p(et131x_pci_remove),
>> -     .suspend        = NULL,         /* et131x_pci_suspend */
>> -     .resume         = NULL,         /* et131x_pci_resume */
>> +#ifdef CONFIG_PM
>> +     .suspend        = et131x_pci_suspend,
>> +     .resume         = et131x_pci_resume,
>> +#endif
>
> There is not much driver specific there. It should probably go through
> pci_driver.driver.pm.

Ok, understood. I'll do this.

>
> --
> Ueimor
>
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