netdev - Re: [PATCHv2][RFC] smsc95xx: enable dynamic autosuspend

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Message-ID: <CAKh2mn7C3r_bvKAv4p3AHco=9JpmewOAJ8JwhtFPw50yDy5cUA@mail.gmail.com>
Date:	Fri, 14 Dec 2012 13:35:04 +0000
From:	Steve Glendinning <steve@...well.net>
To:	Ming Lei <ming.lei@...onical.com>
Cc:	Steve Glendinning <steve.glendinning@...well.net>,
	netdev <netdev@...r.kernel.org>, linux-usb@...r.kernel.org,
	Oliver Neukum <oneukum@...e.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCHv2][RFC] smsc95xx: enable dynamic autosuspend

On 11 December 2012 16:13, Ming Lei <ming.lei@...onical.com> wrote:
> On Tue, Dec 11, 2012 at 11:26 PM, Steve Glendinning
> <steve.glendinning@...well.net> wrote:
>> +
>> +       if (on)
>> +               usb_autopm_get_interface_no_resume(dev->intf);
>> +       else
>> +               usb_autopm_put_interface_no_suspend(dev->intf);
>
> The above line should be
>
>           usb_autopm_put_interface(dev->intf);

Thanks Ming, I've updated this.

> IMO, it is better to keep smsc95xx_info.manage_power as NULL
> for devices without FEATURE_AUTOSUSPEND, so that fewer code
> and follow the current .mange_power usage(see its comment).
>
> Currently, if the function pointer of manage_power is set, it means that
> the device supports USB autosuspend, but your trick will make the
> assumption not true for some smsc devices.

Oliver?


--
Steve Glendinning
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