Re: [PATCH] HID: usbhid: get/put around clearing needs_remote_wakeup

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Nov 14, 2014 at 1:08 AM, Oliver Neukum <oneukum@xxxxxxx> wrote:
> On Thu, 2014-11-13 at 12:16 -0800, Benson Leung wrote:
>
>> In usbhid_open, usb_autopm_get_interface is called
>> before setting the needs_remote_wakeup flag, and
>> usb_autopm_put_interface is called after hid_start_in.
>>
>> However, when the device is closed in usbhid_close, the same
>> protection isn't there when clearing needs_remote_wakeup. This will
>> add that to usbhid_close as well as usbhid_stop.
>
> Interesting, but this has the side effect of waking devices
> that are asleep just to remove the flag.
>
>         Regards


If devices are already asleep with this flag enabled, that means that
they are presently configured for remote wake.

Waking the device in the case of a close() is appropriate because it
also has the effect of re-suspending the device with the capability
disabled, as it is no longer necessary.

-- 
Benson Leung
Software Engineer, Chrom* OS
bleung@xxxxxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Media Devel]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Linux Wireless Networking]     [Linux Omap]

  Powered by Linux